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Finding the Fourth Proportional to 91,887.40, 137,831.10 and 39,302.20

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Solution

The fourth proportional to 91,887.40, 137,831.10 and 39,302.20 is: 58,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,887.40 : 137,831.10 = 39,302.20 : x
  2. Step 2: Convert to fraction form
    91,887.40/137,831.10 = 39,302.20/x
  3. Step 3: Cross multiply
    91,887.40x = 137,831.10 × 39,302.20
  4. Step 4: Simplify right side
    91,887.40x = 5,417,065,458.42
  5. Step 5: Solve for x
    x = 5,417,065,458.42/91,887.40
  6. Step 6: Final answer
    x = 58,953.30

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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.