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Finding the Fourth Proportional to 84,643.70, 126,965.55 and 53,150.90

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Solution

The fourth proportional to 84,643.70, 126,965.55 and 53,150.90 is: 79,726.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,643.70 : 126,965.55 = 53,150.90 : x
  2. Step 2: Convert to fraction form
    84,643.70/126,965.55 = 53,150.90/x
  3. Step 3: Cross multiply
    84,643.70x = 126,965.55 × 53,150.90
  4. Step 4: Simplify right side
    84,643.70x = 6,748,333,251.50
  5. Step 5: Solve for x
    x = 6,748,333,251.50/84,643.70
  6. Step 6: Final answer
    x = 79,726.35

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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.