Home / 103,811.90-155,458.65-68,560.70

Finding the Fourth Proportional to 103,811.90, 155,458.65 and 68,560.70

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Solution

The fourth proportional to 103,811.90, 155,458.65 and 68,560.70 is: 102,669.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,811.90 : 155,458.65 = 68,560.70 : x
  2. Step 2: Convert to fraction form
    103,811.90/155,458.65 = 68,560.70/x
  3. Step 3: Cross multiply
    103,811.90x = 155,458.65 × 68,560.70
  4. Step 4: Simplify right side
    103,811.90x = 10,658,353,865.06
  5. Step 5: Solve for x
    x = 10,658,353,865.06/103,811.90
  6. Step 6: Final answer
    x = 102,669.87

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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.