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Finding the Fourth Proportional to 74,384.92, 111,562.80 and 21,780.28

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Solution

The fourth proportional to 74,384.92, 111,562.80 and 21,780.28 is: 32,666.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,384.92 : 111,562.80 = 21,780.28 : x
  2. Step 2: Convert to fraction form
    74,384.92/111,562.80 = 21,780.28/x
  3. Step 3: Cross multiply
    74,384.92x = 111,562.80 × 21,780.28
  4. Step 4: Simplify right side
    74,384.92x = 2,429,869,021.58
  5. Step 5: Solve for x
    x = 2,429,869,021.58/74,384.92
  6. Step 6: Final answer
    x = 32,666.15

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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.