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Finding the Fourth Proportional to 99,642.94, 137,429.50 and 63,836.28

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Solution

The fourth proportional to 99,642.94, 137,429.50 and 63,836.28 is: 88,044.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,642.94 : 137,429.50 = 63,836.28 : x
  2. Step 2: Convert to fraction form
    99,642.94/137,429.50 = 63,836.28/x
  3. Step 3: Cross multiply
    99,642.94x = 137,429.50 × 63,836.28
  4. Step 4: Simplify right side
    99,642.94x = 8,772,988,042.26
  5. Step 5: Solve for x
    x = 8,772,988,042.26/99,642.94
  6. Step 6: Final answer
    x = 88,044.25

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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.