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Finding the Fourth Proportional to 85,307.55, 127,961.31 and 45,810.33

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Solution

The fourth proportional to 85,307.55, 127,961.31 and 45,810.33 is: 68,715.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,307.55 : 127,961.31 = 45,810.33 : x
  2. Step 2: Convert to fraction form
    85,307.55/127,961.31 = 45,810.33/x
  3. Step 3: Cross multiply
    85,307.55x = 127,961.31 × 45,810.33
  4. Step 4: Simplify right side
    85,307.55x = 5,861,949,838.33
  5. Step 5: Solve for x
    x = 5,861,949,838.33/85,307.55
  6. Step 6: Final answer
    x = 68,715.49

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.