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Finding the Fourth Proportional to 139,441.10, 192,420.90 and 75,778.47

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Solution

The fourth proportional to 139,441.10, 192,420.90 and 75,778.47 is: 104,570.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,441.10 : 192,420.90 = 75,778.47 : x
  2. Step 2: Convert to fraction form
    139,441.10/192,420.90 = 75,778.47/x
  3. Step 3: Cross multiply
    139,441.10x = 192,420.90 × 75,778.47
  4. Step 4: Simplify right side
    139,441.10x = 14,581,361,398.02
  5. Step 5: Solve for x
    x = 14,581,361,398.02/139,441.10
  6. Step 6: Final answer
    x = 104,570.04

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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.