Home / 138,289.16-190,870.10-90,514.68

Finding the Fourth Proportional to 138,289.16, 190,870.10 and 90,514.68

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Solution

The fourth proportional to 138,289.16, 190,870.10 and 90,514.68 is: 124,930.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,289.16 : 190,870.10 = 90,514.68 : x
  2. Step 2: Convert to fraction form
    138,289.16/190,870.10 = 90,514.68/x
  3. Step 3: Cross multiply
    138,289.16x = 190,870.10 × 90,514.68
  4. Step 4: Simplify right side
    138,289.16x = 17,276,546,023.07
  5. Step 5: Solve for x
    x = 17,276,546,023.07/138,289.16
  6. Step 6: Final answer
    x = 124,930.59

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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.