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Finding the Fourth Proportional to 230,886.47, 318,620.31 and 128,913.67

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Solution

The fourth proportional to 230,886.47, 318,620.31 and 128,913.67 is: 177,899.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,886.47 : 318,620.31 = 128,913.67 : x
  2. Step 2: Convert to fraction form
    230,886.47/318,620.31 = 128,913.67/x
  3. Step 3: Cross multiply
    230,886.47x = 318,620.31 × 128,913.67
  4. Step 4: Simplify right side
    230,886.47x = 41,074,511,862.96
  5. Step 5: Solve for x
    x = 41,074,511,862.96/230,886.47
  6. Step 6: Final answer
    x = 177,899.17

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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.