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Finding the Fourth Proportional to 139,236.90, 192,229.35 and 91,572.45

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Solution

The fourth proportional to 139,236.90, 192,229.35 and 91,572.45 is: 126,424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,236.90 : 192,229.35 = 91,572.45 : x
  2. Step 2: Convert to fraction form
    139,236.90/192,229.35 = 91,572.45/x
  3. Step 3: Cross multiply
    139,236.90x = 192,229.35 × 91,572.45
  4. Step 4: Simplify right side
    139,236.90x = 17,602,912,541.41
  5. Step 5: Solve for x
    x = 17,602,912,541.41/139,236.90
  6. Step 6: Final answer
    x = 126,424.19

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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.