Home / 108,581.28-163,121.40-77,069.58

Finding the Fourth Proportional to 108,581.28, 163,121.40 and 77,069.58

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Solution

The fourth proportional to 108,581.28, 163,121.40 and 77,069.58 is: 115,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,581.28 : 163,121.40 = 77,069.58 : x
  2. Step 2: Convert to fraction form
    108,581.28/163,121.40 = 77,069.58/x
  3. Step 3: Cross multiply
    108,581.28x = 163,121.40 × 77,069.58
  4. Step 4: Simplify right side
    108,581.28x = 12,571,697,787.01
  5. Step 5: Solve for x
    x = 12,571,697,787.01/108,581.28
  6. Step 6: Final answer
    x = 115,781.45

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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.