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Finding the Fourth Proportional to 139,386.80, 192,353.46 and 75,724.04

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Solution

The fourth proportional to 139,386.80, 192,353.46 and 75,724.04 is: 104,499.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,386.80 : 192,353.46 = 75,724.04 : x
  2. Step 2: Convert to fraction form
    139,386.80/192,353.46 = 75,724.04/x
  3. Step 3: Cross multiply
    139,386.80x = 192,353.46 × 75,724.04
  4. Step 4: Simplify right side
    139,386.80x = 14,565,781,099.18
  5. Step 5: Solve for x
    x = 14,565,781,099.18/139,386.80
  6. Step 6: Final answer
    x = 104,499.00

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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.