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Finding the Fourth Proportional to 172,172.88, 258,274.17 and 47,513.88

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Solution

The fourth proportional to 172,172.88, 258,274.17 and 47,513.88 is: 71,274.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,172.88 : 258,274.17 = 47,513.88 : x
  2. Step 2: Convert to fraction form
    172,172.88/258,274.17 = 47,513.88/x
  3. Step 3: Cross multiply
    172,172.88x = 258,274.17 × 47,513.88
  4. Step 4: Simplify right side
    172,172.88x = 12,271,607,920.48
  5. Step 5: Solve for x
    x = 12,271,607,920.48/172,172.88
  6. Step 6: Final answer
    x = 71,274.92

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1.5x scale

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.