Home / 99,772.55-137,650.05-76,809.39

Finding the Fourth Proportional to 99,772.55, 137,650.05 and 76,809.39

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Solution

The fourth proportional to 99,772.55, 137,650.05 and 76,809.39 is: 105,969.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,772.55 : 137,650.05 = 76,809.39 : x
  2. Step 2: Convert to fraction form
    99,772.55/137,650.05 = 76,809.39/x
  3. Step 3: Cross multiply
    99,772.55x = 137,650.05 × 76,809.39
  4. Step 4: Simplify right side
    99,772.55x = 10,572,815,989.92
  5. Step 5: Solve for x
    x = 10,572,815,989.92/99,772.55
  6. Step 6: Final answer
    x = 105,969.19

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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.