Home / 86,385.90-129,543.48-30,214.02

Finding the Fourth Proportional to 86,385.90, 129,543.48 and 30,214.02

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Solution

The fourth proportional to 86,385.90, 129,543.48 and 30,214.02 is: 45,308.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,385.90 : 129,543.48 = 30,214.02 : x
  2. Step 2: Convert to fraction form
    86,385.90/129,543.48 = 30,214.02/x
  3. Step 3: Cross multiply
    86,385.90x = 129,543.48 × 30,214.02
  4. Step 4: Simplify right side
    86,385.90x = 3,914,029,295.59
  5. Step 5: Solve for x
    x = 3,914,029,295.59/86,385.90
  6. Step 6: Final answer
    x = 45,308.66

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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.