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Finding the Fourth Proportional to 230,878.32, 318,610.44 and 128,897.76

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Solution

The fourth proportional to 230,878.32, 318,610.44 and 128,897.76 is: 177,877.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,878.32 : 318,610.44 = 128,897.76 : x
  2. Step 2: Convert to fraction form
    230,878.32/318,610.44 = 128,897.76/x
  3. Step 3: Cross multiply
    230,878.32x = 318,610.44 × 128,897.76
  4. Step 4: Simplify right side
    230,878.32x = 41,068,172,028.61
  5. Step 5: Solve for x
    x = 41,068,172,028.61/230,878.32
  6. Step 6: Final answer
    x = 177,877.99

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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.