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Finding the Fourth Proportional to 71,482.78, 98,645.52 and 39,651.58

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Solution

The fourth proportional to 71,482.78, 98,645.52 and 39,651.58 is: 54,718.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,482.78 : 98,645.52 = 39,651.58 : x
  2. Step 2: Convert to fraction form
    71,482.78/98,645.52 = 39,651.58/x
  3. Step 3: Cross multiply
    71,482.78x = 98,645.52 × 39,651.58
  4. Step 4: Simplify right side
    71,482.78x = 3,911,450,727.92
  5. Step 5: Solve for x
    x = 3,911,450,727.92/71,482.78
  6. Step 6: Final answer
    x = 54,718.78

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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.