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Finding the Fourth Proportional to 65,990.61, 91,043.18 and 43,341.87

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Solution

The fourth proportional to 65,990.61, 91,043.18 and 43,341.87 is: 59,796.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,990.61 : 91,043.18 = 43,341.87 : x
  2. Step 2: Convert to fraction form
    65,990.61/91,043.18 = 43,341.87/x
  3. Step 3: Cross multiply
    65,990.61x = 91,043.18 × 43,341.87
  4. Step 4: Simplify right side
    65,990.61x = 3,945,981,455.24
  5. Step 5: Solve for x
    x = 3,945,981,455.24/65,990.61
  6. Step 6: Final answer
    x = 59,796.11

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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.