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Finding the Fourth Proportional to 243,729.20, 365,809.80 and 143,764.40

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Solution

The fourth proportional to 243,729.20, 365,809.80 and 143,764.40 is: 215,774.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,729.20 : 365,809.80 = 143,764.40 : x
  2. Step 2: Convert to fraction form
    243,729.20/365,809.80 = 143,764.40/x
  3. Step 3: Cross multiply
    243,729.20x = 365,809.80 × 143,764.40
  4. Step 4: Simplify right side
    243,729.20x = 52,590,426,411.12
  5. Step 5: Solve for x
    x = 52,590,426,411.12/243,729.20
  6. Step 6: Final answer
    x = 215,774.01

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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.