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Finding the Fourth Proportional to 109,721.93, 151,355.63 and 89,325.93

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Solution

The fourth proportional to 109,721.93, 151,355.63 and 89,325.93 is: 123,220.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,721.93 : 151,355.63 = 89,325.93 : x
  2. Step 2: Convert to fraction form
    109,721.93/151,355.63 = 89,325.93/x
  3. Step 3: Cross multiply
    109,721.93x = 151,355.63 × 89,325.93
  4. Step 4: Simplify right side
    109,721.93x = 13,519,981,963.86
  5. Step 5: Solve for x
    x = 13,519,981,963.86/109,721.93
  6. Step 6: Final answer
    x = 123,220.42

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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.