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Finding the Fourth Proportional to 139,887.61, 209,769.68 and 40,025.07

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Solution

The fourth proportional to 139,887.61, 209,769.68 and 40,025.07 is: 60,019.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,887.61 : 209,769.68 = 40,025.07 : x
  2. Step 2: Convert to fraction form
    139,887.61/209,769.68 = 40,025.07/x
  3. Step 3: Cross multiply
    139,887.61x = 209,769.68 × 40,025.07
  4. Step 4: Simplify right side
    139,887.61x = 8,396,046,225.94
  5. Step 5: Solve for x
    x = 8,396,046,225.94/139,887.61
  6. Step 6: Final answer
    x = 60,019.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.