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Finding the Fourth Proportional to 98,538.66, 136,026.81 and 71,884.53

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Solution

The fourth proportional to 98,538.66, 136,026.81 and 71,884.53 is: 99,232.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,538.66 : 136,026.81 = 71,884.53 : x
  2. Step 2: Convert to fraction form
    98,538.66/136,026.81 = 71,884.53/x
  3. Step 3: Cross multiply
    98,538.66x = 136,026.81 × 71,884.53
  4. Step 4: Simplify right side
    98,538.66x = 9,778,223,304.25
  5. Step 5: Solve for x
    x = 9,778,223,304.25/98,538.66
  6. Step 6: Final answer
    x = 99,232.36

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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.