Home / 99,824.80-137,770-57,385.12

Finding the Fourth Proportional to 99,824.80, 137,770 and 57,385.12

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Solution

The fourth proportional to 99,824.80, 137,770 and 57,385.12 is: 79,198.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,824.80 : 137,770 = 57,385.12 : x
  2. Step 2: Convert to fraction form
    99,824.80/137,770 = 57,385.12/x
  3. Step 3: Cross multiply
    99,824.80x = 137,770 × 57,385.12
  4. Step 4: Simplify right side
    99,824.80x = 7,905,947,982.40
  5. Step 5: Solve for x
    x = 7,905,947,982.40/99,824.80
  6. Step 6: Final answer
    x = 79,198.24

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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.