Home / 102,991.79-142,104.16-62,705.09

Finding the Fourth Proportional to 102,991.79, 142,104.16 and 62,705.09

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Solution

The fourth proportional to 102,991.79, 142,104.16 and 62,705.09 is: 86,518.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,991.79 : 142,104.16 = 62,705.09 : x
  2. Step 2: Convert to fraction form
    102,991.79/142,104.16 = 62,705.09/x
  3. Step 3: Cross multiply
    102,991.79x = 142,104.16 × 62,705.09
  4. Step 4: Simplify right side
    102,991.79x = 8,910,654,142.17
  5. Step 5: Solve for x
    x = 8,910,654,142.17/102,991.79
  6. Step 6: Final answer
    x = 86,518.10

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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.