Home / 81,272.68-121,909.02-34,492.75

Finding the Fourth Proportional to 81,272.68, 121,909.02 and 34,492.75

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Solution

The fourth proportional to 81,272.68, 121,909.02 and 34,492.75 is: 51,739.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,272.68 : 121,909.02 = 34,492.75 : x
  2. Step 2: Convert to fraction form
    81,272.68/121,909.02 = 34,492.75/x
  3. Step 3: Cross multiply
    81,272.68x = 121,909.02 × 34,492.75
  4. Step 4: Simplify right side
    81,272.68x = 4,204,977,349.61
  5. Step 5: Solve for x
    x = 4,204,977,349.61/81,272.68
  6. Step 6: Final answer
    x = 51,739.13

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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.