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Finding the Fourth Proportional to 65,111.20, 97,666.80 and 61,174.60

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Solution

The fourth proportional to 65,111.20, 97,666.80 and 61,174.60 is: 91,761.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,111.20 : 97,666.80 = 61,174.60 : x
  2. Step 2: Convert to fraction form
    65,111.20/97,666.80 = 61,174.60/x
  3. Step 3: Cross multiply
    65,111.20x = 97,666.80 × 61,174.60
  4. Step 4: Simplify right side
    65,111.20x = 5,974,727,423.28
  5. Step 5: Solve for x
    x = 5,974,727,423.28/65,111.20
  6. Step 6: Final answer
    x = 91,761.90

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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.