Home / 84,651.13-126,987.28-31,334.11

Finding the Fourth Proportional to 84,651.13, 126,987.28 and 31,334.11

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Solution

The fourth proportional to 84,651.13, 126,987.28 and 31,334.11 is: 47,005.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,651.13 : 126,987.28 = 31,334.11 : x
  2. Step 2: Convert to fraction form
    84,651.13/126,987.28 = 31,334.11/x
  3. Step 3: Cross multiply
    84,651.13x = 126,987.28 × 31,334.11
  4. Step 4: Simplify right side
    84,651.13x = 3,979,033,004.32
  5. Step 5: Solve for x
    x = 3,979,033,004.32/84,651.13
  6. Step 6: Final answer
    x = 47,005.08

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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.