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Finding the Fourth Proportional to 71,147.84, 98,182.80 and 39,318.08

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Solution

The fourth proportional to 71,147.84, 98,182.80 and 39,318.08 is: 54,258.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,147.84 : 98,182.80 = 39,318.08 : x
  2. Step 2: Convert to fraction form
    71,147.84/98,182.80 = 39,318.08/x
  3. Step 3: Cross multiply
    71,147.84x = 98,182.80 × 39,318.08
  4. Step 4: Simplify right side
    71,147.84x = 3,860,359,185.02
  5. Step 5: Solve for x
    x = 3,860,359,185.02/71,147.84
  6. Step 6: Final answer
    x = 54,258.28

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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.