Home / 135,291.70-186,657.33-78,691.06

Finding the Fourth Proportional to 135,291.70, 186,657.33 and 78,691.06

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Solution

The fourth proportional to 135,291.70, 186,657.33 and 78,691.06 is: 108,567.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,291.70 : 186,657.33 = 78,691.06 : x
  2. Step 2: Convert to fraction form
    135,291.70/186,657.33 = 78,691.06/x
  3. Step 3: Cross multiply
    135,291.70x = 186,657.33 × 78,691.06
  4. Step 4: Simplify right side
    135,291.70x = 14,688,263,154.47
  5. Step 5: Solve for x
    x = 14,688,263,154.47/135,291.70
  6. Step 6: Final answer
    x = 108,567.36

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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.