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Finding the Fourth Proportional to 230,897.85, 318,635.70 and 128,924.90

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Solution

The fourth proportional to 230,897.85, 318,635.70 and 128,924.90 is: 177,914.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,897.85 : 318,635.70 = 128,924.90 : x
  2. Step 2: Convert to fraction form
    230,897.85/318,635.70 = 128,924.90/x
  3. Step 3: Cross multiply
    230,897.85x = 318,635.70 × 128,924.90
  4. Step 4: Simplify right side
    230,897.85x = 41,080,074,165.75
  5. Step 5: Solve for x
    x = 41,080,074,165.75/230,897.85
  6. Step 6: Final answer
    x = 177,914.49

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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.