Home / 90,854.19-135,348.93-86,755.51

Finding the Fourth Proportional to 90,854.19, 135,348.93 and 86,755.51

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Solution

The fourth proportional to 90,854.19, 135,348.93 and 86,755.51 is: 129,242.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,854.19 : 135,348.93 = 86,755.51 : x
  2. Step 2: Convert to fraction form
    90,854.19/135,348.93 = 86,755.51/x
  3. Step 3: Cross multiply
    90,854.19x = 135,348.93 × 86,755.51
  4. Step 4: Simplify right side
    90,854.19x = 11,742,265,101.95
  5. Step 5: Solve for x
    x = 11,742,265,101.95/90,854.19
  6. Step 6: Final answer
    x = 129,242.97

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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.