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Finding the Fourth Proportional to 83,953.80, 125,930.70 and 79,142.40

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Solution

The fourth proportional to 83,953.80, 125,930.70 and 79,142.40 is: 118,713.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,953.80 : 125,930.70 = 79,142.40 : x
  2. Step 2: Convert to fraction form
    83,953.80/125,930.70 = 79,142.40/x
  3. Step 3: Cross multiply
    83,953.80x = 125,930.70 × 79,142.40
  4. Step 4: Simplify right side
    83,953.80x = 9,966,457,831.68
  5. Step 5: Solve for x
    x = 9,966,457,831.68/83,953.80
  6. Step 6: Final answer
    x = 118,713.60

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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.