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Finding the Fourth Proportional to 172,939.51, 259,417.03 and 52,987.67

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Solution

The fourth proportional to 172,939.51, 259,417.03 and 52,987.67 is: 79,483.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,939.51 : 259,417.03 = 52,987.67 : x
  2. Step 2: Convert to fraction form
    172,939.51/259,417.03 = 52,987.67/x
  3. Step 3: Cross multiply
    172,939.51x = 259,417.03 × 52,987.67
  4. Step 4: Simplify right side
    172,939.51x = 13,745,903,620.63
  5. Step 5: Solve for x
    x = 13,745,903,620.63/172,939.51
  6. Step 6: Final answer
    x = 79,483.88

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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.