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Finding the Fourth Proportional to 95,874.60, 143,811.90 and 86,543.40

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Solution

The fourth proportional to 95,874.60, 143,811.90 and 86,543.40 is: 129,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,874.60 : 143,811.90 = 86,543.40 : x
  2. Step 2: Convert to fraction form
    95,874.60/143,811.90 = 86,543.40/x
  3. Step 3: Cross multiply
    95,874.60x = 143,811.90 × 86,543.40
  4. Step 4: Simplify right side
    95,874.60x = 12,445,970,786.46
  5. Step 5: Solve for x
    x = 12,445,970,786.46/95,874.60
  6. Step 6: Final answer
    x = 129,815.10

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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.