Home / 78,497.09-108,326.76-42,687.88

Finding the Fourth Proportional to 78,497.09, 108,326.76 and 42,687.88

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Solution

The fourth proportional to 78,497.09, 108,326.76 and 42,687.88 is: 58,909.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,497.09 : 108,326.76 = 42,687.88 : x
  2. Step 2: Convert to fraction form
    78,497.09/108,326.76 = 42,687.88/x
  3. Step 3: Cross multiply
    78,497.09x = 108,326.76 × 42,687.88
  4. Step 4: Simplify right side
    78,497.09x = 4,624,238,976.60
  5. Step 5: Solve for x
    x = 4,624,238,976.60/78,497.09
  6. Step 6: Final answer
    x = 58,909.69

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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.