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Finding the Fourth Proportional to 172,737.20, 238,371.72 and 105,669.20

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Solution

The fourth proportional to 172,737.20, 238,371.72 and 105,669.20 is: 145,820.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,737.20 : 238,371.72 = 105,669.20 : x
  2. Step 2: Convert to fraction form
    172,737.20/238,371.72 = 105,669.20/x
  3. Step 3: Cross multiply
    172,737.20x = 238,371.72 × 105,669.20
  4. Step 4: Simplify right side
    172,737.20x = 25,188,548,955.02
  5. Step 5: Solve for x
    x = 25,188,548,955.02/172,737.20
  6. Step 6: Final answer
    x = 145,820.06

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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.