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Finding the Fourth Proportional to 61,909.38, 85,438.80 and 35,054.64

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Solution

The fourth proportional to 61,909.38, 85,438.80 and 35,054.64 is: 48,377.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,909.38 : 85,438.80 = 35,054.64 : x
  2. Step 2: Convert to fraction form
    61,909.38/85,438.80 = 35,054.64/x
  3. Step 3: Cross multiply
    61,909.38x = 85,438.80 × 35,054.64
  4. Step 4: Simplify right side
    61,909.38x = 2,995,026,376.03
  5. Step 5: Solve for x
    x = 2,995,026,376.03/61,909.38
  6. Step 6: Final answer
    x = 48,377.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.