Home / 102,186.60-153,539.10-90,781.80

Finding the Fourth Proportional to 102,186.60, 153,539.10 and 90,781.80

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Solution

The fourth proportional to 102,186.60, 153,539.10 and 90,781.80 is: 136,402.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,186.60 : 153,539.10 = 90,781.80 : x
  2. Step 2: Convert to fraction form
    102,186.60/153,539.10 = 90,781.80/x
  3. Step 3: Cross multiply
    102,186.60x = 153,539.10 × 90,781.80
  4. Step 4: Simplify right side
    102,186.60x = 13,938,555,868.38
  5. Step 5: Solve for x
    x = 13,938,555,868.38/102,186.60
  6. Step 6: Final answer
    x = 136,402.97

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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.