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Finding the Fourth Proportional to 71,115.76, 98,149.17 and 68,779.18

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Solution

The fourth proportional to 71,115.76, 98,149.17 and 68,779.18 is: 94,924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,115.76 : 98,149.17 = 68,779.18 : x
  2. Step 2: Convert to fraction form
    71,115.76/98,149.17 = 68,779.18/x
  3. Step 3: Cross multiply
    71,115.76x = 98,149.17 × 68,779.18
  4. Step 4: Simplify right side
    71,115.76x = 6,750,619,430.28
  5. Step 5: Solve for x
    x = 6,750,619,430.28/71,115.76
  6. Step 6: Final answer
    x = 94,924.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.