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Finding the Fourth Proportional to 71,657.56, 98,888.10 and 39,829.96

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Solution

The fourth proportional to 71,657.56, 98,888.10 and 39,829.96 is: 54,965.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,657.56 : 98,888.10 = 39,829.96 : x
  2. Step 2: Convert to fraction form
    71,657.56/98,888.10 = 39,829.96/x
  3. Step 3: Cross multiply
    71,657.56x = 98,888.10 × 39,829.96
  4. Step 4: Simplify right side
    71,657.56x = 3,938,709,067.48
  5. Step 5: Solve for x
    x = 3,938,709,067.48/71,657.56
  6. Step 6: Final answer
    x = 54,965.72

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1.5x scale

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.