Home / 99,890.15-137,848.70-57,445.88

Finding the Fourth Proportional to 99,890.15, 137,848.70 and 57,445.88

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Solution

The fourth proportional to 99,890.15, 137,848.70 and 57,445.88 is: 79,275.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,890.15 : 137,848.70 = 57,445.88 : x
  2. Step 2: Convert to fraction form
    99,890.15/137,848.70 = 57,445.88/x
  3. Step 3: Cross multiply
    99,890.15x = 137,848.70 × 57,445.88
  4. Step 4: Simplify right side
    99,890.15x = 7,918,839,332.73
  5. Step 5: Solve for x
    x = 7,918,839,332.73/99,890.15
  6. Step 6: Final answer
    x = 79,275.48

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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.