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Finding the Fourth Proportional to 172,710, 238,419.86 and 121,764.24

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Solution

The fourth proportional to 172,710, 238,419.86 and 121,764.24 is: 168,091.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,710 : 238,419.86 = 121,764.24 : x
  2. Step 2: Convert to fraction form
    172,710/238,419.86 = 121,764.24/x
  3. Step 3: Cross multiply
    172,710x = 238,419.86 × 121,764.24
  4. Step 4: Simplify right side
    172,710x = 29,031,012,444.99
  5. Step 5: Solve for x
    x = 29,031,012,444.99/172,710
  6. Step 6: Final answer
    x = 168,091.09

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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.