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Finding the Fourth Proportional to 72,937.70, 109,406.55 and 63,721.70

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Solution

The fourth proportional to 72,937.70, 109,406.55 and 63,721.70 is: 95,582.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,937.70 : 109,406.55 = 63,721.70 : x
  2. Step 2: Convert to fraction form
    72,937.70/109,406.55 = 63,721.70/x
  3. Step 3: Cross multiply
    72,937.70x = 109,406.55 × 63,721.70
  4. Step 4: Simplify right side
    72,937.70x = 6,971,571,357.14
  5. Step 5: Solve for x
    x = 6,971,571,357.14/72,937.70
  6. Step 6: Final answer
    x = 95,582.55

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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.