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Finding the Fourth Proportional to 172,178.88, 257,712.80 and 88,958.40

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Solution

The fourth proportional to 172,178.88, 257,712.80 and 88,958.40 is: 133,150.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,178.88 : 257,712.80 = 88,958.40 : x
  2. Step 2: Convert to fraction form
    172,178.88/257,712.80 = 88,958.40/x
  3. Step 3: Cross multiply
    172,178.88x = 257,712.80 × 88,958.40
  4. Step 4: Simplify right side
    172,178.88x = 22,925,718,347.52
  5. Step 5: Solve for x
    x = 22,925,718,347.52/172,178.88
  6. Step 6: Final answer
    x = 133,150.58

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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.