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Finding the Fourth Proportional to 110,419.40, 165,434.70 and 90,590.60

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Solution

The fourth proportional to 110,419.40, 165,434.70 and 90,590.60 is: 135,726.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,419.40 : 165,434.70 = 90,590.60 : x
  2. Step 2: Convert to fraction form
    110,419.40/165,434.70 = 90,590.60/x
  3. Step 3: Cross multiply
    110,419.40x = 165,434.70 × 90,590.60
  4. Step 4: Simplify right side
    110,419.40x = 14,986,828,733.82
  5. Step 5: Solve for x
    x = 14,986,828,733.82/110,419.40
  6. Step 6: Final answer
    x = 135,726.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.