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Finding the Fourth Proportional to 129,570.52, 178,806.54 and 73,000.12

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Solution

The fourth proportional to 129,570.52, 178,806.54 and 73,000.12 is: 100,739.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,570.52 : 178,806.54 = 73,000.12 : x
  2. Step 2: Convert to fraction form
    129,570.52/178,806.54 = 73,000.12/x
  3. Step 3: Cross multiply
    129,570.52x = 178,806.54 × 73,000.12
  4. Step 4: Simplify right side
    129,570.52x = 13,052,898,876.78
  5. Step 5: Solve for x
    x = 13,052,898,876.78/129,570.52
  6. Step 6: Final answer
    x = 100,739.73

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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.