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Finding the Fourth Proportional to 142,712.60, 213,923.10 and 83,517.80

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Solution

The fourth proportional to 142,712.60, 213,923.10 and 83,517.80 is: 125,191.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,712.60 : 213,923.10 = 83,517.80 : x
  2. Step 2: Convert to fraction form
    142,712.60/213,923.10 = 83,517.80/x
  3. Step 3: Cross multiply
    142,712.60x = 213,923.10 × 83,517.80
  4. Step 4: Simplify right side
    142,712.60x = 17,866,386,681.18
  5. Step 5: Solve for x
    x = 17,866,386,681.18/142,712.60
  6. Step 6: Final answer
    x = 125,191.38

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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.