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Finding the Fourth Proportional to 172,360.36, 258,400.81 and 77,521.11

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Solution

The fourth proportional to 172,360.36, 258,400.81 and 77,521.11 is: 116,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,360.36 : 258,400.81 = 77,521.11 : x
  2. Step 2: Convert to fraction form
    172,360.36/258,400.81 = 77,521.11/x
  3. Step 3: Cross multiply
    172,360.36x = 258,400.81 × 77,521.11
  4. Step 4: Simplify right side
    172,360.36x = 20,031,517,616.10
  5. Step 5: Solve for x
    x = 20,031,517,616.10/172,360.36
  6. Step 6: Final answer
    x = 116,218.82

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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.