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Finding the Fourth Proportional to 79,970.88, 119,921.22 and 42,521.88

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Solution

The fourth proportional to 79,970.88, 119,921.22 and 42,521.88 is: 63,764.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,970.88 : 119,921.22 = 42,521.88 : x
  2. Step 2: Convert to fraction form
    79,970.88/119,921.22 = 42,521.88/x
  3. Step 3: Cross multiply
    79,970.88x = 119,921.22 × 42,521.88
  4. Step 4: Simplify right side
    79,970.88x = 5,099,275,726.29
  5. Step 5: Solve for x
    x = 5,099,275,726.29/79,970.88
  6. Step 6: Final answer
    x = 63,764.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.