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Finding the Fourth Proportional to 129,548.91, 178,775.10 and 70,612.89

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Solution

The fourth proportional to 129,548.91, 178,775.10 and 70,612.89 is: 97,444.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,548.91 : 178,775.10 = 70,612.89 : x
  2. Step 2: Convert to fraction form
    129,548.91/178,775.10 = 70,612.89/x
  3. Step 3: Cross multiply
    129,548.91x = 178,775.10 × 70,612.89
  4. Step 4: Simplify right side
    129,548.91x = 12,623,826,471.04
  5. Step 5: Solve for x
    x = 12,623,826,471.04/129,548.91
  6. Step 6: Final answer
    x = 97,444.48

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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.