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Finding the Fourth Proportional to 103,686.80, 155,486.19 and 43,742.15

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Solution

The fourth proportional to 103,686.80, 155,486.19 and 43,742.15 is: 65,594.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,686.80 : 155,486.19 = 43,742.15 : x
  2. Step 2: Convert to fraction form
    103,686.80/155,486.19 = 43,742.15/x
  3. Step 3: Cross multiply
    103,686.80x = 155,486.19 × 43,742.15
  4. Step 4: Simplify right side
    103,686.80x = 6,801,299,468.48
  5. Step 5: Solve for x
    x = 6,801,299,468.48/103,686.80
  6. Step 6: Final answer
    x = 65,594.65

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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.