Home / 121,419.28-182,017.13-81,990.10

Finding the Fourth Proportional to 121,419.28, 182,017.13 and 81,990.10

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Solution

The fourth proportional to 121,419.28, 182,017.13 and 81,990.10 is: 122,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,419.28 : 182,017.13 = 81,990.10 : x
  2. Step 2: Convert to fraction form
    121,419.28/182,017.13 = 81,990.10/x
  3. Step 3: Cross multiply
    121,419.28x = 182,017.13 × 81,990.10
  4. Step 4: Simplify right side
    121,419.28x = 14,923,602,440.35
  5. Step 5: Solve for x
    x = 14,923,602,440.35/121,419.28
  6. Step 6: Final answer
    x = 122,909.66

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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.