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Finding the Fourth Proportional to 71,650.32, 98,873.64 and 39,818.40

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Solution

The fourth proportional to 71,650.32, 98,873.64 and 39,818.40 is: 54,947.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,650.32 : 98,873.64 = 39,818.40 : x
  2. Step 2: Convert to fraction form
    71,650.32/98,873.64 = 39,818.40/x
  3. Step 3: Cross multiply
    71,650.32x = 98,873.64 × 39,818.40
  4. Step 4: Simplify right side
    71,650.32x = 3,936,990,146.98
  5. Step 5: Solve for x
    x = 3,936,990,146.98/71,650.32
  6. Step 6: Final answer
    x = 54,947.28

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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.