Home / 120,138.18-165,802.77-66,427.26

Finding the Fourth Proportional to 120,138.18, 165,802.77 and 66,427.26

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Solution

The fourth proportional to 120,138.18, 165,802.77 and 66,427.26 is: 91,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,138.18 : 165,802.77 = 66,427.26 : x
  2. Step 2: Convert to fraction form
    120,138.18/165,802.77 = 66,427.26/x
  3. Step 3: Cross multiply
    120,138.18x = 165,802.77 × 66,427.26
  4. Step 4: Simplify right side
    120,138.18x = 11,013,823,711.51
  5. Step 5: Solve for x
    x = 11,013,823,711.51/120,138.18
  6. Step 6: Final answer
    x = 91,676.30

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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.