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Finding the Fourth Proportional to 172,938.76, 259,416.09 and 52,987.12

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Solution

The fourth proportional to 172,938.76, 259,416.09 and 52,987.12 is: 79,483.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.76 : 259,416.09 = 52,987.12 : x
  2. Step 2: Convert to fraction form
    172,938.76/259,416.09 = 52,987.12/x
  3. Step 3: Cross multiply
    172,938.76x = 259,416.09 × 52,987.12
  4. Step 4: Simplify right side
    172,938.76x = 13,745,711,490.76
  5. Step 5: Solve for x
    x = 13,745,711,490.76/172,938.76
  6. Step 6: Final answer
    x = 79,483.12

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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.