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Finding the Fourth Proportional to 68,351.20, 102,526.80 and 67,890.40

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Solution

The fourth proportional to 68,351.20, 102,526.80 and 67,890.40 is: 101,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,351.20 : 102,526.80 = 67,890.40 : x
  2. Step 2: Convert to fraction form
    68,351.20/102,526.80 = 67,890.40/x
  3. Step 3: Cross multiply
    68,351.20x = 102,526.80 × 67,890.40
  4. Step 4: Simplify right side
    68,351.20x = 6,960,585,462.72
  5. Step 5: Solve for x
    x = 6,960,585,462.72/68,351.20
  6. Step 6: Final answer
    x = 101,835.60

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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.