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Finding the Fourth Proportional to 169,822.32, 254,345.04 and 81,138.12

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Solution

The fourth proportional to 169,822.32, 254,345.04 and 81,138.12 is: 121,521.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,822.32 : 254,345.04 = 81,138.12 : x
  2. Step 2: Convert to fraction form
    169,822.32/254,345.04 = 81,138.12/x
  3. Step 3: Cross multiply
    169,822.32x = 254,345.04 × 81,138.12
  4. Step 4: Simplify right side
    169,822.32x = 20,637,078,376.92
  5. Step 5: Solve for x
    x = 20,637,078,376.92/169,822.32
  6. Step 6: Final answer
    x = 121,521.59

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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.