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Finding the Fourth Proportional to 172,978.46, 259,478.62 and 73,125.51

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Solution

The fourth proportional to 172,978.46, 259,478.62 and 73,125.51 is: 109,692.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,978.46 : 259,478.62 = 73,125.51 : x
  2. Step 2: Convert to fraction form
    172,978.46/259,478.62 = 73,125.51/x
  3. Step 3: Cross multiply
    172,978.46x = 259,478.62 × 73,125.51
  4. Step 4: Simplify right side
    172,978.46x = 18,974,506,421.60
  5. Step 5: Solve for x
    x = 18,974,506,421.60/172,978.46
  6. Step 6: Final answer
    x = 109,692.89

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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.