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Finding the Fourth Proportional to 139,432.59, 192,415.91 and 75,770.24

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Solution

The fourth proportional to 139,432.59, 192,415.91 and 75,770.24 is: 104,562.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,432.59 : 192,415.91 = 75,770.24 : x
  2. Step 2: Convert to fraction form
    139,432.59/192,415.91 = 75,770.24/x
  3. Step 3: Cross multiply
    139,432.59x = 192,415.91 × 75,770.24
  4. Step 4: Simplify right side
    139,432.59x = 14,579,398,339.59
  5. Step 5: Solve for x
    x = 14,579,398,339.59/139,432.59
  6. Step 6: Final answer
    x = 104,562.34

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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.