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Finding the Fourth Proportional to 145,191.96, 217,780.11 and 45,340.70

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Solution

The fourth proportional to 145,191.96, 217,780.11 and 45,340.70 is: 68,008.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,191.96 : 217,780.11 = 45,340.70 : x
  2. Step 2: Convert to fraction form
    145,191.96/217,780.11 = 45,340.70/x
  3. Step 3: Cross multiply
    145,191.96x = 217,780.11 × 45,340.70
  4. Step 4: Simplify right side
    145,191.96x = 9,874,301,544.58
  5. Step 5: Solve for x
    x = 9,874,301,544.58/145,191.96
  6. Step 6: Final answer
    x = 68,008.60

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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.