Home / 135,301.89-186,754.14-78,724.20

Finding the Fourth Proportional to 135,301.89, 186,754.14 and 78,724.20

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Solution

The fourth proportional to 135,301.89, 186,754.14 and 78,724.20 is: 108,661.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,301.89 : 186,754.14 = 78,724.20 : x
  2. Step 2: Convert to fraction form
    135,301.89/186,754.14 = 78,724.20/x
  3. Step 3: Cross multiply
    135,301.89x = 186,754.14 × 78,724.20
  4. Step 4: Simplify right side
    135,301.89x = 14,702,070,268.19
  5. Step 5: Solve for x
    x = 14,702,070,268.19/135,301.89
  6. Step 6: Final answer
    x = 108,661.23

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1.5x scale

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.