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Finding the Fourth Proportional to 172,908, 238,613.04 and 93,420

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Solution

The fourth proportional to 172,908, 238,613.04 and 93,420 is: 128,919.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,908 : 238,613.04 = 93,420 : x
  2. Step 2: Convert to fraction form
    172,908/238,613.04 = 93,420/x
  3. Step 3: Cross multiply
    172,908x = 238,613.04 × 93,420
  4. Step 4: Simplify right side
    172,908x = 22,291,230,196.80
  5. Step 5: Solve for x
    x = 22,291,230,196.80/172,908
  6. Step 6: Final answer
    x = 128,919.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.