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Finding the Fourth Proportional to 149,275.91, 205,987.20 and 88,836.80

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Solution

The fourth proportional to 149,275.91, 205,987.20 and 88,836.80 is: 122,586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,275.91 : 205,987.20 = 88,836.80 : x
  2. Step 2: Convert to fraction form
    149,275.91/205,987.20 = 88,836.80/x
  3. Step 3: Cross multiply
    149,275.91x = 205,987.20 × 88,836.80
  4. Step 4: Simplify right side
    149,275.91x = 18,299,243,984.27
  5. Step 5: Solve for x
    x = 18,299,243,984.27/149,275.91
  6. Step 6: Final answer
    x = 122,586.72

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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.