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Finding the Fourth Proportional to 65,087.40, 97,631.10 and 31,812.60

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Solution

The fourth proportional to 65,087.40, 97,631.10 and 31,812.60 is: 47,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,087.40 : 97,631.10 = 31,812.60 : x
  2. Step 2: Convert to fraction form
    65,087.40/97,631.10 = 31,812.60/x
  3. Step 3: Cross multiply
    65,087.40x = 97,631.10 × 31,812.60
  4. Step 4: Simplify right side
    65,087.40x = 3,105,899,131.86
  5. Step 5: Solve for x
    x = 3,105,899,131.86/65,087.40
  6. Step 6: Final answer
    x = 47,718.90

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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.