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Finding the Fourth Proportional to 123,487.58, 185,034.54 and 79,077.80

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Solution

The fourth proportional to 123,487.58, 185,034.54 and 79,077.80 is: 118,490.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,487.58 : 185,034.54 = 79,077.80 : x
  2. Step 2: Convert to fraction form
    123,487.58/185,034.54 = 79,077.80/x
  3. Step 3: Cross multiply
    123,487.58x = 185,034.54 × 79,077.80
  4. Step 4: Simplify right side
    123,487.58x = 14,632,124,347.21
  5. Step 5: Solve for x
    x = 14,632,124,347.21/123,487.58
  6. Step 6: Final answer
    x = 118,490.66

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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.