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Finding the Fourth Proportional to 172,501.32, 258,664.47 and 78,926.88

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Solution

The fourth proportional to 172,501.32, 258,664.47 and 78,926.88 is: 118,350.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,501.32 : 258,664.47 = 78,926.88 : x
  2. Step 2: Convert to fraction form
    172,501.32/258,664.47 = 78,926.88/x
  3. Step 3: Cross multiply
    172,501.32x = 258,664.47 × 78,926.88
  4. Step 4: Simplify right side
    172,501.32x = 20,415,579,583.95
  5. Step 5: Solve for x
    x = 20,415,579,583.95/172,501.32
  6. Step 6: Final answer
    x = 118,350.28

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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.