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Finding the Fourth Proportional to 230,886.72, 318,620.65 and 128,913.92

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Solution

The fourth proportional to 230,886.72, 318,620.65 and 128,913.92 is: 177,899.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,886.72 : 318,620.65 = 128,913.92 : x
  2. Step 2: Convert to fraction form
    230,886.72/318,620.65 = 128,913.92/x
  3. Step 3: Cross multiply
    230,886.72x = 318,620.65 × 128,913.92
  4. Step 4: Simplify right side
    230,886.72x = 41,074,635,713.63
  5. Step 5: Solve for x
    x = 41,074,635,713.63/230,886.72
  6. Step 6: Final answer
    x = 177,899.52

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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.