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Finding the Fourth Proportional to 128,034.91, 176,678.72 and 74,311.26

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Solution

The fourth proportional to 128,034.91, 176,678.72 and 74,311.26 is: 102,544.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.91 : 176,678.72 = 74,311.26 : x
  2. Step 2: Convert to fraction form
    128,034.91/176,678.72 = 74,311.26/x
  3. Step 3: Cross multiply
    128,034.91x = 176,678.72 × 74,311.26
  4. Step 4: Simplify right side
    128,034.91x = 13,129,217,542.95
  5. Step 5: Solve for x
    x = 13,129,217,542.95/128,034.91
  6. Step 6: Final answer
    x = 102,544.04

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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.