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Finding the Fourth Proportional to 72,929.66, 109,350.70 and 28,503.47

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Solution

The fourth proportional to 72,929.66, 109,350.70 and 28,503.47 is: 42,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,929.66 : 109,350.70 = 28,503.47 : x
  2. Step 2: Convert to fraction form
    72,929.66/109,350.70 = 28,503.47/x
  3. Step 3: Cross multiply
    72,929.66x = 109,350.70 × 28,503.47
  4. Step 4: Simplify right side
    72,929.66x = 3,116,874,599.05
  5. Step 5: Solve for x
    x = 3,116,874,599.05/72,929.66
  6. Step 6: Final answer
    x = 42,738.10

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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.