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Finding the Fourth Proportional to 119,780, 179,669.28 and 31,033.28

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Solution

The fourth proportional to 119,780, 179,669.28 and 31,033.28 is: 46,549.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,780 : 179,669.28 = 31,033.28 : x
  2. Step 2: Convert to fraction form
    119,780/179,669.28 = 31,033.28/x
  3. Step 3: Cross multiply
    119,780x = 179,669.28 × 31,033.28
  4. Step 4: Simplify right side
    119,780x = 5,575,727,073.64
  5. Step 5: Solve for x
    x = 5,575,727,073.64/119,780
  6. Step 6: Final answer
    x = 46,549.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.