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Finding the Fourth Proportional to 139,521.60, 209,317.68 and 60,649.92

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Solution

The fourth proportional to 139,521.60, 209,317.68 and 60,649.92 is: 90,990.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,521.60 : 209,317.68 = 60,649.92 : x
  2. Step 2: Convert to fraction form
    139,521.60/209,317.68 = 60,649.92/x
  3. Step 3: Cross multiply
    139,521.60x = 209,317.68 × 60,649.92
  4. Step 4: Simplify right side
    139,521.60x = 12,695,100,546.59
  5. Step 5: Solve for x
    x = 12,695,100,546.59/139,521.60
  6. Step 6: Final answer
    x = 90,990.22

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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.