Home / 72,920.81-109,377.56-28,555.70

Finding the Fourth Proportional to 72,920.81, 109,377.56 and 28,555.70

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Solution

The fourth proportional to 72,920.81, 109,377.56 and 28,555.70 is: 42,832.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,920.81 : 109,377.56 = 28,555.70 : x
  2. Step 2: Convert to fraction form
    72,920.81/109,377.56 = 28,555.70/x
  3. Step 3: Cross multiply
    72,920.81x = 109,377.56 × 28,555.70
  4. Step 4: Simplify right side
    72,920.81x = 3,123,352,314.59
  5. Step 5: Solve for x
    x = 3,123,352,314.59/72,920.81
  6. Step 6: Final answer
    x = 42,832.11

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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.