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Finding the Fourth Proportional to 139,282.60, 192,209.98 and 75,620.40

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Solution

The fourth proportional to 139,282.60, 192,209.98 and 75,620.40 is: 104,356.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,282.60 : 192,209.98 = 75,620.40 : x
  2. Step 2: Convert to fraction form
    139,282.60/192,209.98 = 75,620.40/x
  3. Step 3: Cross multiply
    139,282.60x = 192,209.98 × 75,620.40
  4. Step 4: Simplify right side
    139,282.60x = 14,534,995,193.49
  5. Step 5: Solve for x
    x = 14,534,995,193.49/139,282.60
  6. Step 6: Final answer
    x = 104,356.15

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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.