Home / 135,971.65-187,667.85-86,881.87

Finding the Fourth Proportional to 135,971.65, 187,667.85 and 86,881.87

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Solution

The fourth proportional to 135,971.65, 187,667.85 and 86,881.87 is: 119,914.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,971.65 : 187,667.85 = 86,881.87 : x
  2. Step 2: Convert to fraction form
    135,971.65/187,667.85 = 86,881.87/x
  3. Step 3: Cross multiply
    135,971.65x = 187,667.85 × 86,881.87
  4. Step 4: Simplify right side
    135,971.65x = 16,304,933,746.88
  5. Step 5: Solve for x
    x = 16,304,933,746.88/135,971.65
  6. Step 6: Final answer
    x = 119,914.22

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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.