Home / 99,986.40-137,981.60-54,663.68

Finding the Fourth Proportional to 99,986.40, 137,981.60 and 54,663.68

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Solution

The fourth proportional to 99,986.40, 137,981.60 and 54,663.68 is: 75,436.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,986.40 : 137,981.60 = 54,663.68 : x
  2. Step 2: Convert to fraction form
    99,986.40/137,981.60 = 54,663.68/x
  3. Step 3: Cross multiply
    99,986.40x = 137,981.60 × 54,663.68
  4. Step 4: Simplify right side
    99,986.40x = 7,542,582,028.29
  5. Step 5: Solve for x
    x = 7,542,582,028.29/99,986.40
  6. Step 6: Final answer
    x = 75,436.08

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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.