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Finding the Fourth Proportional to 109,990.70, 151,785.98 and 61,593.08

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Solution

The fourth proportional to 109,990.70, 151,785.98 and 61,593.08 is: 84,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,990.70 : 151,785.98 = 61,593.08 : x
  2. Step 2: Convert to fraction form
    109,990.70/151,785.98 = 61,593.08/x
  3. Step 3: Cross multiply
    109,990.70x = 151,785.98 × 61,593.08
  4. Step 4: Simplify right side
    109,990.70x = 9,348,966,009.02
  5. Step 5: Solve for x
    x = 9,348,966,009.02/109,990.70
  6. Step 6: Final answer
    x = 84,997.79

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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.