Home / 103,740.30-155,610.45-68,310.90

Finding the Fourth Proportional to 103,740.30, 155,610.45 and 68,310.90

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Solution

The fourth proportional to 103,740.30, 155,610.45 and 68,310.90 is: 102,466.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,740.30 : 155,610.45 = 68,310.90 : x
  2. Step 2: Convert to fraction form
    103,740.30/155,610.45 = 68,310.90/x
  3. Step 3: Cross multiply
    103,740.30x = 155,610.45 × 68,310.90
  4. Step 4: Simplify right side
    103,740.30x = 10,629,889,888.91
  5. Step 5: Solve for x
    x = 10,629,889,888.91/103,740.30
  6. Step 6: Final answer
    x = 102,466.35

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1.5x scale

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.