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Finding the Fourth Proportional to 65,818.80, 98,614.80 and 30,686.40

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Solution

The fourth proportional to 65,818.80, 98,614.80 and 30,686.40 is: 45,976.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,818.80 : 98,614.80 = 30,686.40 : x
  2. Step 2: Convert to fraction form
    65,818.80/98,614.80 = 30,686.40/x
  3. Step 3: Cross multiply
    65,818.80x = 98,614.80 × 30,686.40
  4. Step 4: Simplify right side
    65,818.80x = 3,026,133,198.72
  5. Step 5: Solve for x
    x = 3,026,133,198.72/65,818.80
  6. Step 6: Final answer
    x = 45,976.73

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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.