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Finding the Fourth Proportional to 172,229.93, 258,256.35 and 77,378.83

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Solution

The fourth proportional to 172,229.93, 258,256.35 and 77,378.83 is: 116,028.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,229.93 : 258,256.35 = 77,378.83 : x
  2. Step 2: Convert to fraction form
    172,229.93/258,256.35 = 77,378.83/x
  3. Step 3: Cross multiply
    172,229.93x = 258,256.35 × 77,378.83
  4. Step 4: Simplify right side
    172,229.93x = 19,983,573,557.43
  5. Step 5: Solve for x
    x = 19,983,573,557.43/172,229.93
  6. Step 6: Final answer
    x = 116,028.46

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1.5x scale

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.