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Finding the Fourth Proportional to 81,060, 121,589.36 and 24,900

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Solution

The fourth proportional to 81,060, 121,589.36 and 24,900 is: 37,349.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,060 : 121,589.36 = 24,900 : x
  2. Step 2: Convert to fraction form
    81,060/121,589.36 = 24,900/x
  3. Step 3: Cross multiply
    81,060x = 121,589.36 × 24,900
  4. Step 4: Simplify right side
    81,060x = 3,027,575,064
  5. Step 5: Solve for x
    x = 3,027,575,064/81,060
  6. Step 6: Final answer
    x = 37,349.80

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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.