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Finding the Fourth Proportional to 172,939.76, 259,417.59 and 52,988.12

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Solution

The fourth proportional to 172,939.76, 259,417.59 and 52,988.12 is: 79,484.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,939.76 : 259,417.59 = 52,988.12 : x
  2. Step 2: Convert to fraction form
    172,939.76/259,417.59 = 52,988.12/x
  3. Step 3: Cross multiply
    172,939.76x = 259,417.59 × 52,988.12
  4. Step 4: Simplify right side
    172,939.76x = 13,746,050,389.03
  5. Step 5: Solve for x
    x = 13,746,050,389.03/172,939.76
  6. Step 6: Final answer
    x = 79,484.62

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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.