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Finding the Fourth Proportional to 68,211.90, 102,313.08 and 25,509.20

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Solution

The fourth proportional to 68,211.90, 102,313.08 and 25,509.20 is: 38,262.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,211.90 : 102,313.08 = 25,509.20 : x
  2. Step 2: Convert to fraction form
    68,211.90/102,313.08 = 25,509.20/x
  3. Step 3: Cross multiply
    68,211.90x = 102,313.08 × 25,509.20
  4. Step 4: Simplify right side
    68,211.90x = 2,609,924,820.34
  5. Step 5: Solve for x
    x = 2,609,924,820.34/68,211.90
  6. Step 6: Final answer
    x = 38,262.02

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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.