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Finding the Fourth Proportional to 172,915.04, 259,299.12 and 67,717.28

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Solution

The fourth proportional to 172,915.04, 259,299.12 and 67,717.28 is: 101,547.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,915.04 : 259,299.12 = 67,717.28 : x
  2. Step 2: Convert to fraction form
    172,915.04/259,299.12 = 67,717.28/x
  3. Step 3: Cross multiply
    172,915.04x = 259,299.12 × 67,717.28
  4. Step 4: Simplify right side
    172,915.04x = 17,559,031,112.79
  5. Step 5: Solve for x
    x = 17,559,031,112.79/172,915.04
  6. Step 6: Final answer
    x = 101,547.16

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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.