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Finding the Fourth Proportional to 142,792.40, 214,188.60 and 83,694.80

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Solution

The fourth proportional to 142,792.40, 214,188.60 and 83,694.80 is: 125,542.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,792.40 : 214,188.60 = 83,694.80 : x
  2. Step 2: Convert to fraction form
    142,792.40/214,188.60 = 83,694.80/x
  3. Step 3: Cross multiply
    142,792.40x = 214,188.60 × 83,694.80
  4. Step 4: Simplify right side
    142,792.40x = 17,926,472,039.28
  5. Step 5: Solve for x
    x = 17,926,472,039.28/142,792.40
  6. Step 6: Final answer
    x = 125,542.20

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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.