Home / 99,705.15-149,645.21-55,381.95

Finding the Fourth Proportional to 99,705.15, 149,645.21 and 55,381.95

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Solution

The fourth proportional to 99,705.15, 149,645.21 and 55,381.95 is: 83,121.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,705.15 : 149,645.21 = 55,381.95 : x
  2. Step 2: Convert to fraction form
    99,705.15/149,645.21 = 55,381.95/x
  3. Step 3: Cross multiply
    99,705.15x = 149,645.21 × 55,381.95
  4. Step 4: Simplify right side
    99,705.15x = 8,287,643,261.05
  5. Step 5: Solve for x
    x = 8,287,643,261.05/99,705.15
  6. Step 6: Final answer
    x = 83,121.52

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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.