Home / 120,143.22-165,802.35-79,787.40

Finding the Fourth Proportional to 120,143.22, 165,802.35 and 79,787.40

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Solution

The fourth proportional to 120,143.22, 165,802.35 and 79,787.40 is: 110,109.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.22 : 165,802.35 = 79,787.40 : x
  2. Step 2: Convert to fraction form
    120,143.22/165,802.35 = 79,787.40/x
  3. Step 3: Cross multiply
    120,143.22x = 165,802.35 × 79,787.40
  4. Step 4: Simplify right side
    120,143.22x = 13,228,938,420.39
  5. Step 5: Solve for x
    x = 13,228,938,420.39/120,143.22
  6. Step 6: Final answer
    x = 110,109.74

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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.