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Finding the Fourth Proportional to 65,077.20, 97,615.80 and 61,140.60

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Solution

The fourth proportional to 65,077.20, 97,615.80 and 61,140.60 is: 91,710.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,077.20 : 97,615.80 = 61,140.60 : x
  2. Step 2: Convert to fraction form
    65,077.20/97,615.80 = 61,140.60/x
  3. Step 3: Cross multiply
    65,077.20x = 97,615.80 × 61,140.60
  4. Step 4: Simplify right side
    65,077.20x = 5,968,288,581.48
  5. Step 5: Solve for x
    x = 5,968,288,581.48/65,077.20
  6. Step 6: Final answer
    x = 91,710.90

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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.