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Finding the Fourth Proportional to 172,956.60, 238,643.82 and 105,009.35

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Solution

The fourth proportional to 172,956.60, 238,643.82 and 105,009.35 is: 144,890.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,956.60 : 238,643.82 = 105,009.35 : x
  2. Step 2: Convert to fraction form
    172,956.60/238,643.82 = 105,009.35/x
  3. Step 3: Cross multiply
    172,956.60x = 238,643.82 × 105,009.35
  4. Step 4: Simplify right side
    172,956.60x = 25,059,832,419.72
  5. Step 5: Solve for x
    x = 25,059,832,419.72/172,956.60
  6. Step 6: Final answer
    x = 144,890.87

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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.