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Finding the Fourth Proportional to 72,339.13, 108,377.47 and 53,410.64

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Solution

The fourth proportional to 72,339.13, 108,377.47 and 53,410.64 is: 80,019.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,339.13 : 108,377.47 = 53,410.64 : x
  2. Step 2: Convert to fraction form
    72,339.13/108,377.47 = 53,410.64/x
  3. Step 3: Cross multiply
    72,339.13x = 108,377.47 × 53,410.64
  4. Step 4: Simplify right side
    72,339.13x = 5,788,510,018.56
  5. Step 5: Solve for x
    x = 5,788,510,018.56/72,339.13
  6. Step 6: Final answer
    x = 80,019.08

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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.