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Finding the Fourth Proportional to 172,931.10, 259,252.65 and 73,167.90

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Solution

The fourth proportional to 172,931.10, 259,252.65 and 73,167.90 is: 109,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,931.10 : 259,252.65 = 73,167.90 : x
  2. Step 2: Convert to fraction form
    172,931.10/259,252.65 = 73,167.90/x
  3. Step 3: Cross multiply
    172,931.10x = 259,252.65 × 73,167.90
  4. Step 4: Simplify right side
    172,931.10x = 18,968,971,969.94
  5. Step 5: Solve for x
    x = 18,968,971,969.94/172,931.10
  6. Step 6: Final answer
    x = 109,690.92

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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.