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Finding the Fourth Proportional to 139,386.88, 192,356.23 and 75,724.73

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Solution

The fourth proportional to 139,386.88, 192,356.23 and 75,724.73 is: 104,501.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,386.88 : 192,356.23 = 75,724.73 : x
  2. Step 2: Convert to fraction form
    139,386.88/192,356.23 = 75,724.73/x
  3. Step 3: Cross multiply
    139,386.88x = 192,356.23 × 75,724.73
  4. Step 4: Simplify right side
    139,386.88x = 14,566,123,580.57
  5. Step 5: Solve for x
    x = 14,566,123,580.57/139,386.88
  6. Step 6: Final answer
    x = 104,501.40

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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.