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Finding the Fourth Proportional to 230,882.79, 318,615.15 and 128,909.82

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Solution

The fourth proportional to 230,882.79, 318,615.15 and 128,909.82 is: 177,893.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,882.79 : 318,615.15 = 128,909.82 : x
  2. Step 2: Convert to fraction form
    230,882.79/318,615.15 = 128,909.82/x
  3. Step 3: Cross multiply
    230,882.79x = 318,615.15 × 128,909.82
  4. Step 4: Simplify right side
    230,882.79x = 41,072,621,635.77
  5. Step 5: Solve for x
    x = 41,072,621,635.77/230,882.79
  6. Step 6: Final answer
    x = 177,893.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.