Home / 81,012.16-121,517.28-34,233.28

Finding the Fourth Proportional to 81,012.16, 121,517.28 and 34,233.28

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Solution

The fourth proportional to 81,012.16, 121,517.28 and 34,233.28 is: 51,349.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,012.16 : 121,517.28 = 34,233.28 : x
  2. Step 2: Convert to fraction form
    81,012.16/121,517.28 = 34,233.28/x
  3. Step 3: Cross multiply
    81,012.16x = 121,517.28 × 34,233.28
  4. Step 4: Simplify right side
    81,012.16x = 4,159,935,071.08
  5. Step 5: Solve for x
    x = 4,159,935,071.08/81,012.16
  6. Step 6: Final answer
    x = 51,349.51

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1.5x scale

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.