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Finding the Fourth Proportional to 139,420.71, 209,013.39 and 60,475.41

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Solution

The fourth proportional to 139,420.71, 209,013.39 and 60,475.41 is: 90,662.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,420.71 : 209,013.39 = 60,475.41 : x
  2. Step 2: Convert to fraction form
    139,420.71/209,013.39 = 60,475.41/x
  3. Step 3: Cross multiply
    139,420.71x = 209,013.39 × 60,475.41
  4. Step 4: Simplify right side
    139,420.71x = 12,640,170,455.74
  5. Step 5: Solve for x
    x = 12,640,170,455.74/139,420.71
  6. Step 6: Final answer
    x = 90,662.07

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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.