Home / 81,288.13-112,215.97-61,152.68

Finding the Fourth Proportional to 81,288.13, 112,215.97 and 61,152.68

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Solution

The fourth proportional to 81,288.13, 112,215.97 and 61,152.68 is: 84,419.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,288.13 : 112,215.97 = 61,152.68 : x
  2. Step 2: Convert to fraction form
    81,288.13/112,215.97 = 61,152.68/x
  3. Step 3: Cross multiply
    81,288.13x = 112,215.97 × 61,152.68
  4. Step 4: Simplify right side
    81,288.13x = 6,862,307,304.30
  5. Step 5: Solve for x
    x = 6,862,307,304.30/81,288.13
  6. Step 6: Final answer
    x = 84,419.55

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1.5x scale

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.