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Finding the Fourth Proportional to 109,449.87, 151,038.84 and 61,703.29

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Solution

The fourth proportional to 109,449.87, 151,038.84 and 61,703.29 is: 85,149.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,449.87 : 151,038.84 = 61,703.29 : x
  2. Step 2: Convert to fraction form
    109,449.87/151,038.84 = 61,703.29/x
  3. Step 3: Cross multiply
    109,449.87x = 151,038.84 × 61,703.29
  4. Step 4: Simplify right side
    109,449.87x = 9,319,593,345.78
  5. Step 5: Solve for x
    x = 9,319,593,345.78/109,449.87
  6. Step 6: Final answer
    x = 85,149.42

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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.