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Finding the Fourth Proportional to 139,370.64, 192,331.80 and 75,707.04

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Solution

The fourth proportional to 139,370.64, 192,331.80 and 75,707.04 is: 104,475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,370.64 : 192,331.80 = 75,707.04 : x
  2. Step 2: Convert to fraction form
    139,370.64/192,331.80 = 75,707.04/x
  3. Step 3: Cross multiply
    139,370.64x = 192,331.80 × 75,707.04
  4. Step 4: Simplify right side
    139,370.64x = 14,560,871,275.87
  5. Step 5: Solve for x
    x = 14,560,871,275.87/139,370.64
  6. Step 6: Final answer
    x = 104,475.89

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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.