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Finding the Fourth Proportional to 129,594.88, 178,874.31 and 84,385.72

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Solution

The fourth proportional to 129,594.88, 178,874.31 and 84,385.72 is: 116,474.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,594.88 : 178,874.31 = 84,385.72 : x
  2. Step 2: Convert to fraction form
    129,594.88/178,874.31 = 84,385.72/x
  3. Step 3: Cross multiply
    129,594.88x = 178,874.31 × 84,385.72
  4. Step 4: Simplify right side
    129,594.88x = 15,094,437,438.85
  5. Step 5: Solve for x
    x = 15,094,437,438.85/129,594.88
  6. Step 6: Final answer
    x = 116,474.03

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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.