Home / 90,855.19-135,350.42-86,756.51

Finding the Fourth Proportional to 90,855.19, 135,350.42 and 86,756.51

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Solution

The fourth proportional to 90,855.19, 135,350.42 and 86,756.51 is: 129,244.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,855.19 : 135,350.42 = 86,756.51 : x
  2. Step 2: Convert to fraction form
    90,855.19/135,350.42 = 86,756.51/x
  3. Step 3: Cross multiply
    90,855.19x = 135,350.42 × 86,756.51
  4. Step 4: Simplify right side
    90,855.19x = 11,742,530,066.23
  5. Step 5: Solve for x
    x = 11,742,530,066.23/90,855.19
  6. Step 6: Final answer
    x = 129,244.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.