Home / 103,538.10-155,307.15-68,108.70

Finding the Fourth Proportional to 103,538.10, 155,307.15 and 68,108.70

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Solution

The fourth proportional to 103,538.10, 155,307.15 and 68,108.70 is: 102,163.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,538.10 : 155,307.15 = 68,108.70 : x
  2. Step 2: Convert to fraction form
    103,538.10/155,307.15 = 68,108.70/x
  3. Step 3: Cross multiply
    103,538.10x = 155,307.15 × 68,108.70
  4. Step 4: Simplify right side
    103,538.10x = 10,577,768,087.21
  5. Step 5: Solve for x
    x = 10,577,768,087.21/103,538.10
  6. Step 6: Final answer
    x = 102,163.05

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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.