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Finding the Fourth Proportional to 172,974, 238,580.28 and 112,431.72

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Solution

The fourth proportional to 172,974, 238,580.28 and 112,431.72 is: 155,075.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,974 : 238,580.28 = 112,431.72 : x
  2. Step 2: Convert to fraction form
    172,974/238,580.28 = 112,431.72/x
  3. Step 3: Cross multiply
    172,974x = 238,580.28 × 112,431.72
  4. Step 4: Simplify right side
    172,974x = 26,823,991,238.48
  5. Step 5: Solve for x
    x = 26,823,991,238.48/172,974
  6. Step 6: Final answer
    x = 155,075.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.