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Finding the Fourth Proportional to 119,437.54, 164,819.61 and 65,721.17

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Solution

The fourth proportional to 119,437.54, 164,819.61 and 65,721.17 is: 90,692.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,437.54 : 164,819.61 = 65,721.17 : x
  2. Step 2: Convert to fraction form
    119,437.54/164,819.61 = 65,721.17/x
  3. Step 3: Cross multiply
    119,437.54x = 164,819.61 × 65,721.17
  4. Step 4: Simplify right side
    119,437.54x = 10,832,138,020.19
  5. Step 5: Solve for x
    x = 10,832,138,020.19/119,437.54
  6. Step 6: Final answer
    x = 90,692.91

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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.