Home / 99,881.17-137,830.75-54,558.50

Finding the Fourth Proportional to 99,881.17, 137,830.75 and 54,558.50

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Solution

The fourth proportional to 99,881.17, 137,830.75 and 54,558.50 is: 75,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,881.17 : 137,830.75 = 54,558.50 : x
  2. Step 2: Convert to fraction form
    99,881.17/137,830.75 = 54,558.50/x
  3. Step 3: Cross multiply
    99,881.17x = 137,830.75 × 54,558.50
  4. Step 4: Simplify right side
    99,881.17x = 7,519,838,148.33
  5. Step 5: Solve for x
    x = 7,519,838,148.33/99,881.17
  6. Step 6: Final answer
    x = 75,287.85

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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.