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Finding the Fourth Proportional to 83,118.60, 124,985.10 and 69,601.80

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Solution

The fourth proportional to 83,118.60, 124,985.10 and 69,601.80 is: 104,659.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,118.60 : 124,985.10 = 69,601.80 : x
  2. Step 2: Convert to fraction form
    83,118.60/124,985.10 = 69,601.80/x
  3. Step 3: Cross multiply
    83,118.60x = 124,985.10 × 69,601.80
  4. Step 4: Simplify right side
    83,118.60x = 8,699,187,933.18
  5. Step 5: Solve for x
    x = 8,699,187,933.18/83,118.60
  6. Step 6: Final answer
    x = 104,659.94

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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.