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Finding the Fourth Proportional to 145,298.75, 217,310.72 and 129,400.40

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Solution

The fourth proportional to 145,298.75, 217,310.72 and 129,400.40 is: 193,532.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,298.75 : 217,310.72 = 129,400.40 : x
  2. Step 2: Convert to fraction form
    145,298.75/217,310.72 = 129,400.40/x
  3. Step 3: Cross multiply
    145,298.75x = 217,310.72 × 129,400.40
  4. Step 4: Simplify right side
    145,298.75x = 28,120,093,988.56
  5. Step 5: Solve for x
    x = 28,120,093,988.56/145,298.75
  6. Step 6: Final answer
    x = 193,532.94

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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.