Home / 81,248.50-121,873.14-21,276.86

Finding the Fourth Proportional to 81,248.50, 121,873.14 and 21,276.86

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Solution

The fourth proportional to 81,248.50, 121,873.14 and 21,276.86 is: 31,915.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,248.50 : 121,873.14 = 21,276.86 : x
  2. Step 2: Convert to fraction form
    81,248.50/121,873.14 = 21,276.86/x
  3. Step 3: Cross multiply
    81,248.50x = 121,873.14 × 21,276.86
  4. Step 4: Simplify right side
    81,248.50x = 2,593,077,897.37
  5. Step 5: Solve for x
    x = 2,593,077,897.37/81,248.50
  6. Step 6: Final answer
    x = 31,915.39

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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.