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Finding the Fourth Proportional to 65,318.08, 90,138.88 and 35,510.08

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Solution

The fourth proportional to 65,318.08, 90,138.88 and 35,510.08 is: 49,003.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,318.08 : 90,138.88 = 35,510.08 : x
  2. Step 2: Convert to fraction form
    65,318.08/90,138.88 = 35,510.08/x
  3. Step 3: Cross multiply
    65,318.08x = 90,138.88 × 35,510.08
  4. Step 4: Simplify right side
    65,318.08x = 3,200,838,839.91
  5. Step 5: Solve for x
    x = 3,200,838,839.91/65,318.08
  6. Step 6: Final answer
    x = 49,003.87

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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.