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Finding the Fourth Proportional to 85,675.59, 128,512.98 and 57,152.25

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Solution

The fourth proportional to 85,675.59, 128,512.98 and 57,152.25 is: 85,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,675.59 : 128,512.98 = 57,152.25 : x
  2. Step 2: Convert to fraction form
    85,675.59/128,512.98 = 57,152.25/x
  3. Step 3: Cross multiply
    85,675.59x = 128,512.98 × 57,152.25
  4. Step 4: Simplify right side
    85,675.59x = 7,344,805,961.21
  5. Step 5: Solve for x
    x = 7,344,805,961.21/85,675.59
  6. Step 6: Final answer
    x = 85,728.10

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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.