Home / 138,228.36-190,580.76-90,405.96

Finding the Fourth Proportional to 138,228.36, 190,580.76 and 90,405.96

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Solution

The fourth proportional to 138,228.36, 190,580.76 and 90,405.96 is: 124,646.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,228.36 : 190,580.76 = 90,405.96 : x
  2. Step 2: Convert to fraction form
    138,228.36/190,580.76 = 90,405.96/x
  3. Step 3: Cross multiply
    138,228.36x = 190,580.76 × 90,405.96
  4. Step 4: Simplify right side
    138,228.36x = 17,229,636,565.33
  5. Step 5: Solve for x
    x = 17,229,636,565.33/138,228.36
  6. Step 6: Final answer
    x = 124,646.18

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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.