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Finding the Fourth Proportional to 139,397.65, 209,078.47 and 44,619.90

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Solution

The fourth proportional to 139,397.65, 209,078.47 and 44,619.90 is: 66,924.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,397.65 : 209,078.47 = 44,619.90 : x
  2. Step 2: Convert to fraction form
    139,397.65/209,078.47 = 44,619.90/x
  3. Step 3: Cross multiply
    139,397.65x = 209,078.47 × 44,619.90
  4. Step 4: Simplify right side
    139,397.65x = 9,329,060,423.55
  5. Step 5: Solve for x
    x = 9,329,060,423.55/139,397.65
  6. Step 6: Final answer
    x = 66,924.09

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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.