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Finding the Fourth Proportional to 103,209.39, 154,813.95 and 68,140.71

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Solution

The fourth proportional to 103,209.39, 154,813.95 and 68,140.71 is: 102,210.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,209.39 : 154,813.95 = 68,140.71 : x
  2. Step 2: Convert to fraction form
    103,209.39/154,813.95 = 68,140.71/x
  3. Step 3: Cross multiply
    103,209.39x = 154,813.95 × 68,140.71
  4. Step 4: Simplify right side
    103,209.39x = 10,549,132,470.90
  5. Step 5: Solve for x
    x = 10,549,132,470.90/103,209.39
  6. Step 6: Final answer
    x = 102,210.98

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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.