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Finding the Fourth Proportional to 243,638.21, 365,509.47 and 72,873.32

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Solution

The fourth proportional to 243,638.21, 365,509.47 and 72,873.32 is: 109,325.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,638.21 : 365,509.47 = 72,873.32 : x
  2. Step 2: Convert to fraction form
    243,638.21/365,509.47 = 72,873.32/x
  3. Step 3: Cross multiply
    243,638.21x = 365,509.47 × 72,873.32
  4. Step 4: Simplify right side
    243,638.21x = 26,635,887,326.31
  5. Step 5: Solve for x
    x = 26,635,887,326.31/243,638.21
  6. Step 6: Final answer
    x = 109,325.58

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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.