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Finding the Fourth Proportional to 139,425.84, 192,407.28 and 75,763.86

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Solution

The fourth proportional to 139,425.84, 192,407.28 and 75,763.86 is: 104,553.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,425.84 : 192,407.28 = 75,763.86 : x
  2. Step 2: Convert to fraction form
    139,425.84/192,407.28 = 75,763.86/x
  3. Step 3: Cross multiply
    139,425.84x = 192,407.28 × 75,763.86
  4. Step 4: Simplify right side
    139,425.84x = 14,577,518,224.90
  5. Step 5: Solve for x
    x = 14,577,518,224.90/139,425.84
  6. Step 6: Final answer
    x = 104,553.92

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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.