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Finding the Fourth Proportional to 79,489.87, 109,702.12 and 45,509.01

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Solution

The fourth proportional to 79,489.87, 109,702.12 and 45,509.01 is: 62,805.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,489.87 : 109,702.12 = 45,509.01 : x
  2. Step 2: Convert to fraction form
    79,489.87/109,702.12 = 45,509.01/x
  3. Step 3: Cross multiply
    79,489.87x = 109,702.12 × 45,509.01
  4. Step 4: Simplify right side
    79,489.87x = 4,992,434,876.10
  5. Step 5: Solve for x
    x = 4,992,434,876.10/79,489.87
  6. Step 6: Final answer
    x = 62,805.93

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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.