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Finding the Fourth Proportional to 72,924.71, 109,377.81 and 28,582.61

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Solution

The fourth proportional to 72,924.71, 109,377.81 and 28,582.61 is: 42,870.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,924.71 : 109,377.81 = 28,582.61 : x
  2. Step 2: Convert to fraction form
    72,924.71/109,377.81 = 28,582.61/x
  3. Step 3: Cross multiply
    72,924.71x = 109,377.81 × 28,582.61
  4. Step 4: Simplify right side
    72,924.71x = 3,126,302,739.00
  5. Step 5: Solve for x
    x = 3,126,302,739.00/72,924.71
  6. Step 6: Final answer
    x = 42,870.28

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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.