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Finding the Fourth Proportional to 129,693.72, 178,991.82 and 76,024.14

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Solution

The fourth proportional to 129,693.72, 178,991.82 and 76,024.14 is: 104,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,693.72 : 178,991.82 = 76,024.14 : x
  2. Step 2: Convert to fraction form
    129,693.72/178,991.82 = 76,024.14/x
  3. Step 3: Cross multiply
    129,693.72x = 178,991.82 × 76,024.14
  4. Step 4: Simplify right side
    129,693.72x = 13,607,699,182.53
  5. Step 5: Solve for x
    x = 13,607,699,182.53/129,693.72
  6. Step 6: Final answer
    x = 104,921.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.