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Finding the Fourth Proportional to 139,420.64, 192,400.80 and 75,757.04

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Solution

The fourth proportional to 139,420.64, 192,400.80 and 75,757.04 is: 104,544.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,420.64 : 192,400.80 = 75,757.04 : x
  2. Step 2: Convert to fraction form
    139,420.64/192,400.80 = 75,757.04/x
  3. Step 3: Cross multiply
    139,420.64x = 192,400.80 × 75,757.04
  4. Step 4: Simplify right side
    139,420.64x = 14,575,715,101.63
  5. Step 5: Solve for x
    x = 14,575,715,101.63/139,420.64
  6. Step 6: Final answer
    x = 104,544.89

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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.