Home / 81,326.48-121,988.28-31,417.52

Finding the Fourth Proportional to 81,326.48, 121,988.28 and 31,417.52

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Solution

The fourth proportional to 81,326.48, 121,988.28 and 31,417.52 is: 47,125.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,326.48 : 121,988.28 = 31,417.52 : x
  2. Step 2: Convert to fraction form
    81,326.48/121,988.28 = 31,417.52/x
  3. Step 3: Cross multiply
    81,326.48x = 121,988.28 × 31,417.52
  4. Step 4: Simplify right side
    81,326.48x = 3,832,569,226.67
  5. Step 5: Solve for x
    x = 3,832,569,226.67/81,326.48
  6. Step 6: Final answer
    x = 47,125.72

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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.