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Finding the Fourth Proportional to 109,980, 151,737.09 and 61,574.78

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Solution

The fourth proportional to 109,980, 151,737.09 and 61,574.78 is: 84,953.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,980 : 151,737.09 = 61,574.78 : x
  2. Step 2: Convert to fraction form
    109,980/151,737.09 = 61,574.78/x
  3. Step 3: Cross multiply
    109,980x = 151,737.09 × 61,574.78
  4. Step 4: Simplify right side
    109,980x = 9,343,177,175.90
  5. Step 5: Solve for x
    x = 9,343,177,175.90/109,980
  6. Step 6: Final answer
    x = 84,953.42

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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.