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Finding the Fourth Proportional to 230,988.34, 318,743.18 and 128,999.66

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Solution

The fourth proportional to 230,988.34, 318,743.18 and 128,999.66 is: 178,007.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,988.34 : 318,743.18 = 128,999.66 : x
  2. Step 2: Convert to fraction form
    230,988.34/318,743.18 = 128,999.66/x
  3. Step 3: Cross multiply
    230,988.34x = 318,743.18 × 128,999.66
  4. Step 4: Simplify right side
    230,988.34x = 41,117,761,847.32
  5. Step 5: Solve for x
    x = 41,117,761,847.32/230,988.34
  6. Step 6: Final answer
    x = 178,007.95

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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.