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Finding the Fourth Proportional to 247,574.85, 371,387.45 and 85,447.80

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Solution

The fourth proportional to 247,574.85, 371,387.45 and 85,447.80 is: 128,180.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,574.85 : 371,387.45 = 85,447.80 : x
  2. Step 2: Convert to fraction form
    247,574.85/371,387.45 = 85,447.80/x
  3. Step 3: Cross multiply
    247,574.85x = 371,387.45 × 85,447.80
  4. Step 4: Simplify right side
    247,574.85x = 31,734,238,977.43
  5. Step 5: Solve for x
    x = 31,734,238,977.43/247,574.85
  6. Step 6: Final answer
    x = 128,180.38

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1.5x scale

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.