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Finding the Fourth Proportional to 243,003.80, 364,505.70 and 85,175.30

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Solution

The fourth proportional to 243,003.80, 364,505.70 and 85,175.30 is: 127,762.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,003.80 : 364,505.70 = 85,175.30 : x
  2. Step 2: Convert to fraction form
    243,003.80/364,505.70 = 85,175.30/x
  3. Step 3: Cross multiply
    243,003.80x = 364,505.70 × 85,175.30
  4. Step 4: Simplify right side
    243,003.80x = 31,046,882,349.21
  5. Step 5: Solve for x
    x = 31,046,882,349.21/243,003.80
  6. Step 6: Final answer
    x = 127,762.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.