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Finding the Fourth Proportional to 139,188.16, 208,680 and 44,363.80

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Solution

The fourth proportional to 139,188.16, 208,680 and 44,363.80 is: 66,513.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,188.16 : 208,680 = 44,363.80 : x
  2. Step 2: Convert to fraction form
    139,188.16/208,680 = 44,363.80/x
  3. Step 3: Cross multiply
    139,188.16x = 208,680 × 44,363.80
  4. Step 4: Simplify right side
    139,188.16x = 9,257,837,784
  5. Step 5: Solve for x
    x = 9,257,837,784/139,188.16
  6. Step 6: Final answer
    x = 66,513.11

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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.