Home / 149,135.54-205,803.63-81,152.69

Finding the Fourth Proportional to 149,135.54, 205,803.63 and 81,152.69

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Solution

The fourth proportional to 149,135.54, 205,803.63 and 81,152.69 is: 111,988.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,135.54 : 205,803.63 = 81,152.69 : x
  2. Step 2: Convert to fraction form
    149,135.54/205,803.63 = 81,152.69/x
  3. Step 3: Cross multiply
    149,135.54x = 205,803.63 × 81,152.69
  4. Step 4: Simplify right side
    149,135.54x = 16,701,517,157.25
  5. Step 5: Solve for x
    x = 16,701,517,157.25/149,135.54
  6. Step 6: Final answer
    x = 111,988.85

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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.