Home / 135,324.60-186,781.74-81,641.40

Finding the Fourth Proportional to 135,324.60, 186,781.74 and 81,641.40

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Solution

The fourth proportional to 135,324.60, 186,781.74 and 81,641.40 is: 112,685.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,324.60 : 186,781.74 = 81,641.40 : x
  2. Step 2: Convert to fraction form
    135,324.60/186,781.74 = 81,641.40/x
  3. Step 3: Cross multiply
    135,324.60x = 186,781.74 × 81,641.40
  4. Step 4: Simplify right side
    135,324.60x = 15,249,122,748.04
  5. Step 5: Solve for x
    x = 15,249,122,748.04/135,324.60
  6. Step 6: Final answer
    x = 112,685.52

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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.