Home / 80,848.30-121,355.21-66,763.45

Finding the Fourth Proportional to 80,848.30, 121,355.21 and 66,763.45

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Solution

The fourth proportional to 80,848.30, 121,355.21 and 66,763.45 is: 100,213.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,848.30 : 121,355.21 = 66,763.45 : x
  2. Step 2: Convert to fraction form
    80,848.30/121,355.21 = 66,763.45/x
  3. Step 3: Cross multiply
    80,848.30x = 121,355.21 × 66,763.45
  4. Step 4: Simplify right side
    80,848.30x = 8,102,092,495.07
  5. Step 5: Solve for x
    x = 8,102,092,495.07/80,848.30
  6. Step 6: Final answer
    x = 100,213.52

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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.