Home / 135,239.22-186,667.74-78,661.53

Finding the Fourth Proportional to 135,239.22, 186,667.74 and 78,661.53

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Solution

The fourth proportional to 135,239.22, 186,667.74 and 78,661.53 is: 108,574.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,239.22 : 186,667.74 = 78,661.53 : x
  2. Step 2: Convert to fraction form
    135,239.22/186,667.74 = 78,661.53/x
  3. Step 3: Cross multiply
    135,239.22x = 186,667.74 × 78,661.53
  4. Step 4: Simplify right side
    135,239.22x = 14,683,570,030.04
  5. Step 5: Solve for x
    x = 14,683,570,030.04/135,239.22
  6. Step 6: Final answer
    x = 108,574.79

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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.