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Finding the Fourth Proportional to 230,486.32, 318,047.88 and 128,502.18

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Solution

The fourth proportional to 230,486.32, 318,047.88 and 128,502.18 is: 177,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,486.32 : 318,047.88 = 128,502.18 : x
  2. Step 2: Convert to fraction form
    230,486.32/318,047.88 = 128,502.18/x
  3. Step 3: Cross multiply
    230,486.32x = 318,047.88 × 128,502.18
  4. Step 4: Simplify right side
    230,486.32x = 40,869,845,924.38
  5. Step 5: Solve for x
    x = 40,869,845,924.38/230,486.32
  6. Step 6: Final answer
    x = 177,320.05

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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.