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Finding the Fourth Proportional to 139,605.32, 209,287.02 and 56,445.32

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Solution

The fourth proportional to 139,605.32, 209,287.02 and 56,445.32 is: 84,619.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,605.32 : 209,287.02 = 56,445.32 : x
  2. Step 2: Convert to fraction form
    139,605.32/209,287.02 = 56,445.32/x
  3. Step 3: Cross multiply
    139,605.32x = 209,287.02 × 56,445.32
  4. Step 4: Simplify right side
    139,605.32x = 11,813,272,815.75
  5. Step 5: Solve for x
    x = 11,813,272,815.75/139,605.32
  6. Step 6: Final answer
    x = 84,619.07

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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.