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Finding the Fourth Proportional to 99,854.92, 137,799.78 and 57,421.80

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Solution

The fourth proportional to 99,854.92, 137,799.78 and 57,421.80 is: 79,242.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,854.92 : 137,799.78 = 57,421.80 : x
  2. Step 2: Convert to fraction form
    99,854.92/137,799.78 = 57,421.80/x
  3. Step 3: Cross multiply
    99,854.92x = 137,799.78 × 57,421.80
  4. Step 4: Simplify right side
    99,854.92x = 7,912,711,407.20
  5. Step 5: Solve for x
    x = 7,912,711,407.20/99,854.92
  6. Step 6: Final answer
    x = 79,242.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.