Home / 100,155.60-149,990.40-53,305.20

Finding the Fourth Proportional to 100,155.60, 149,990.40 and 53,305.20

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Solution

The fourth proportional to 100,155.60, 149,990.40 and 53,305.20 is: 79,828.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,155.60 : 149,990.40 = 53,305.20 : x
  2. Step 2: Convert to fraction form
    100,155.60/149,990.40 = 53,305.20/x
  3. Step 3: Cross multiply
    100,155.60x = 149,990.40 × 53,305.20
  4. Step 4: Simplify right side
    100,155.60x = 7,995,268,270.08
  5. Step 5: Solve for x
    x = 7,995,268,270.08/100,155.60
  6. Step 6: Final answer
    x = 79,828.47

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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.