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Finding the Fourth Proportional to 288,167.68, 432,213.23 and 85,760.15

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Solution

The fourth proportional to 288,167.68, 432,213.23 and 85,760.15 is: 128,628.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,167.68 : 432,213.23 = 85,760.15 : x
  2. Step 2: Convert to fraction form
    288,167.68/432,213.23 = 85,760.15/x
  3. Step 3: Cross multiply
    288,167.68x = 432,213.23 × 85,760.15
  4. Step 4: Simplify right side
    288,167.68x = 37,066,671,436.78
  5. Step 5: Solve for x
    x = 37,066,671,436.78/288,167.68
  6. Step 6: Final answer
    x = 128,628.83

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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.