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Finding the Fourth Proportional to 71,686.80, 107,400.60 and 63,392.40

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Solution

The fourth proportional to 71,686.80, 107,400.60 and 63,392.40 is: 94,974.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,686.80 : 107,400.60 = 63,392.40 : x
  2. Step 2: Convert to fraction form
    71,686.80/107,400.60 = 63,392.40/x
  3. Step 3: Cross multiply
    71,686.80x = 107,400.60 × 63,392.40
  4. Step 4: Simplify right side
    71,686.80x = 6,808,381,795.44
  5. Step 5: Solve for x
    x = 6,808,381,795.44/71,686.80
  6. Step 6: Final answer
    x = 94,974.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.