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Finding the Fourth Proportional to 172,918.64, 238,646.07 and 101,358.79

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Solution

The fourth proportional to 172,918.64, 238,646.07 and 101,358.79 is: 139,885.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,918.64 : 238,646.07 = 101,358.79 : x
  2. Step 2: Convert to fraction form
    172,918.64/238,646.07 = 101,358.79/x
  3. Step 3: Cross multiply
    172,918.64x = 238,646.07 × 101,358.79
  4. Step 4: Simplify right side
    172,918.64x = 24,188,875,700.23
  5. Step 5: Solve for x
    x = 24,188,875,700.23/172,918.64
  6. Step 6: Final answer
    x = 139,885.88

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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.