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Finding the Fourth Proportional to 91,209.62, 136,813.71 and 49,109.42

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Solution

The fourth proportional to 91,209.62, 136,813.71 and 49,109.42 is: 73,663.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,209.62 : 136,813.71 = 49,109.42 : x
  2. Step 2: Convert to fraction form
    91,209.62/136,813.71 = 49,109.42/x
  3. Step 3: Cross multiply
    91,209.62x = 136,813.71 × 49,109.42
  4. Step 4: Simplify right side
    91,209.62x = 6,718,841,946.15
  5. Step 5: Solve for x
    x = 6,718,841,946.15/91,209.62
  6. Step 6: Final answer
    x = 73,663.74

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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.