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Finding the Fourth Proportional to 121,521.61, 182,108.65 and 89,247.53

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Solution

The fourth proportional to 121,521.61, 182,108.65 and 89,247.53 is: 133,743.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,521.61 : 182,108.65 = 89,247.53 : x
  2. Step 2: Convert to fraction form
    121,521.61/182,108.65 = 89,247.53/x
  3. Step 3: Cross multiply
    121,521.61x = 182,108.65 × 89,247.53
  4. Step 4: Simplify right side
    121,521.61x = 16,252,746,405.15
  5. Step 5: Solve for x
    x = 16,252,746,405.15/121,521.61
  6. Step 6: Final answer
    x = 133,743.68

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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.