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Finding the Fourth Proportional to 73,123.97, 100,911.75 and 42,909.80

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Solution

The fourth proportional to 73,123.97, 100,911.75 and 42,909.80 is: 59,215.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,123.97 : 100,911.75 = 42,909.80 : x
  2. Step 2: Convert to fraction form
    73,123.97/100,911.75 = 42,909.80/x
  3. Step 3: Cross multiply
    73,123.97x = 100,911.75 × 42,909.80
  4. Step 4: Simplify right side
    73,123.97x = 4,330,102,505.59
  5. Step 5: Solve for x
    x = 4,330,102,505.59/73,123.97
  6. Step 6: Final answer
    x = 59,215.91

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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.