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Finding the Fourth Proportional to 139,130.80, 192,000.60 and 75,468.40

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Solution

The fourth proportional to 139,130.80, 192,000.60 and 75,468.40 is: 104,146.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,130.80 : 192,000.60 = 75,468.40 : x
  2. Step 2: Convert to fraction form
    139,130.80/192,000.60 = 75,468.40/x
  3. Step 3: Cross multiply
    139,130.80x = 192,000.60 × 75,468.40
  4. Step 4: Simplify right side
    139,130.80x = 14,489,978,081.04
  5. Step 5: Solve for x
    x = 14,489,978,081.04/139,130.80
  6. Step 6: Final answer
    x = 104,146.44

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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.