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Finding the Fourth Proportional to 71,392.84, 98,520.94 and 39,127.21

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Solution

The fourth proportional to 71,392.84, 98,520.94 and 39,127.21 is: 53,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,392.84 : 98,520.94 = 39,127.21 : x
  2. Step 2: Convert to fraction form
    71,392.84/98,520.94 = 39,127.21/x
  3. Step 3: Cross multiply
    71,392.84x = 98,520.94 × 39,127.21
  4. Step 4: Simplify right side
    71,392.84x = 3,854,849,508.78
  5. Step 5: Solve for x
    x = 3,854,849,508.78/71,392.84
  6. Step 6: Final answer
    x = 53,994.90

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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.