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Finding the Fourth Proportional to 129,548.74, 178,822 and 75,851

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Solution

The fourth proportional to 129,548.74, 178,822 and 75,851 is: 104,700.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,548.74 : 178,822 = 75,851 : x
  2. Step 2: Convert to fraction form
    129,548.74/178,822 = 75,851/x
  3. Step 3: Cross multiply
    129,548.74x = 178,822 × 75,851
  4. Step 4: Simplify right side
    129,548.74x = 13,563,827,522
  5. Step 5: Solve for x
    x = 13,563,827,522/129,548.74
  6. Step 6: Final answer
    x = 104,700.57

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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.