Home / 99,891.23-137,817.91-71,215.55

Finding the Fourth Proportional to 99,891.23, 137,817.91 and 71,215.55

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Solution

The fourth proportional to 99,891.23, 137,817.91 and 71,215.55 is: 98,254.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,891.23 : 137,817.91 = 71,215.55 : x
  2. Step 2: Convert to fraction form
    99,891.23/137,817.91 = 71,215.55/x
  3. Step 3: Cross multiply
    99,891.23x = 137,817.91 × 71,215.55
  4. Step 4: Simplify right side
    99,891.23x = 9,814,778,551.89
  5. Step 5: Solve for x
    x = 9,814,778,551.89/99,891.23
  6. Step 6: Final answer
    x = 98,254.66

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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.