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Finding the Fourth Proportional to 128,034.46, 176,747.30 and 74,309.05

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Solution

The fourth proportional to 128,034.46, 176,747.30 and 74,309.05 is: 102,581.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,034.46 : 176,747.30 = 74,309.05 : x
  2. Step 2: Convert to fraction form
    128,034.46/176,747.30 = 74,309.05/x
  3. Step 3: Cross multiply
    128,034.46x = 176,747.30 × 74,309.05
  4. Step 4: Simplify right side
    128,034.46x = 13,133,923,953.07
  5. Step 5: Solve for x
    x = 13,133,923,953.07/128,034.46
  6. Step 6: Final answer
    x = 102,581.16

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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.