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Finding the Fourth Proportional to 65,065.20, 97,597.80 and 61,128.60

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Solution

The fourth proportional to 65,065.20, 97,597.80 and 61,128.60 is: 91,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,065.20 : 97,597.80 = 61,128.60 : x
  2. Step 2: Convert to fraction form
    65,065.20/97,597.80 = 61,128.60/x
  3. Step 3: Cross multiply
    65,065.20x = 97,597.80 × 61,128.60
  4. Step 4: Simplify right side
    65,065.20x = 5,966,016,877.08
  5. Step 5: Solve for x
    x = 5,966,016,877.08/65,065.20
  6. Step 6: Final answer
    x = 91,692.90

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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.