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Finding the Fourth Proportional to 85,358.16, 127,865.76 and 42,534.42

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Solution

The fourth proportional to 85,358.16, 127,865.76 and 42,534.42 is: 63,716.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,358.16 : 127,865.76 = 42,534.42 : x
  2. Step 2: Convert to fraction form
    85,358.16/127,865.76 = 42,534.42/x
  3. Step 3: Cross multiply
    85,358.16x = 127,865.76 × 42,534.42
  4. Step 4: Simplify right side
    85,358.16x = 5,438,695,939.46
  5. Step 5: Solve for x
    x = 5,438,695,939.46/85,358.16
  6. Step 6: Final answer
    x = 63,716.18

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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.