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Finding the Fourth Proportional to 243,043.40, 364,565.10 and 85,255.40

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Solution

The fourth proportional to 243,043.40, 364,565.10 and 85,255.40 is: 127,883.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,043.40 : 364,565.10 = 85,255.40 : x
  2. Step 2: Convert to fraction form
    243,043.40/364,565.10 = 85,255.40/x
  3. Step 3: Cross multiply
    243,043.40x = 364,565.10 × 85,255.40
  4. Step 4: Simplify right side
    243,043.40x = 31,081,143,426.54
  5. Step 5: Solve for x
    x = 31,081,143,426.54/243,043.40
  6. Step 6: Final answer
    x = 127,883.10

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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.