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Finding the Fourth Proportional to 128,050.47, 176,714.46 and 71,472.78

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Solution

The fourth proportional to 128,050.47, 176,714.46 and 71,472.78 is: 98,635.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,050.47 : 176,714.46 = 71,472.78 : x
  2. Step 2: Convert to fraction form
    128,050.47/176,714.46 = 71,472.78/x
  3. Step 3: Cross multiply
    128,050.47x = 176,714.46 × 71,472.78
  4. Step 4: Simplify right side
    128,050.47x = 12,630,273,722.40
  5. Step 5: Solve for x
    x = 12,630,273,722.40/128,050.47
  6. Step 6: Final answer
    x = 98,635.12

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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.