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Finding the Fourth Proportional to 61,157.40, 91,736.10 and 43,442.70

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Solution

The fourth proportional to 61,157.40, 91,736.10 and 43,442.70 is: 65,164.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,157.40 : 91,736.10 = 43,442.70 : x
  2. Step 2: Convert to fraction form
    61,157.40/91,736.10 = 43,442.70/x
  3. Step 3: Cross multiply
    61,157.40x = 91,736.10 × 43,442.70
  4. Step 4: Simplify right side
    61,157.40x = 3,985,263,871.47
  5. Step 5: Solve for x
    x = 3,985,263,871.47/61,157.40
  6. Step 6: Final answer
    x = 65,164.05

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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.