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Finding the Fourth Proportional to 129,602.84, 178,855.71 and 75,882.83

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Solution

The fourth proportional to 129,602.84, 178,855.71 and 75,882.83 is: 104,720.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,602.84 : 178,855.71 = 75,882.83 : x
  2. Step 2: Convert to fraction form
    129,602.84/178,855.71 = 75,882.83/x
  3. Step 3: Cross multiply
    129,602.84x = 178,855.71 × 75,882.83
  4. Step 4: Simplify right side
    129,602.84x = 13,572,077,436.46
  5. Step 5: Solve for x
    x = 13,572,077,436.46/129,602.84
  6. Step 6: Final answer
    x = 104,720.52

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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.