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Finding the Fourth Proportional to 65,897.40, 98,711.70 and 40,860.60

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Solution

The fourth proportional to 65,897.40, 98,711.70 and 40,860.60 is: 61,207.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,897.40 : 98,711.70 = 40,860.60 : x
  2. Step 2: Convert to fraction form
    65,897.40/98,711.70 = 40,860.60/x
  3. Step 3: Cross multiply
    65,897.40x = 98,711.70 × 40,860.60
  4. Step 4: Simplify right side
    65,897.40x = 4,033,419,289.02
  5. Step 5: Solve for x
    x = 4,033,419,289.02/65,897.40
  6. Step 6: Final answer
    x = 61,207.56

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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.