Home / 128,815.18-193,255.47-40,069.35

Finding the Fourth Proportional to 128,815.18, 193,255.47 and 40,069.35

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Solution

The fourth proportional to 128,815.18, 193,255.47 and 40,069.35 is: 60,114.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.18 : 193,255.47 = 40,069.35 : x
  2. Step 2: Convert to fraction form
    128,815.18/193,255.47 = 40,069.35/x
  3. Step 3: Cross multiply
    128,815.18x = 193,255.47 × 40,069.35
  4. Step 4: Simplify right side
    128,815.18x = 7,743,621,066.84
  5. Step 5: Solve for x
    x = 7,743,621,066.84/128,815.18
  6. Step 6: Final answer
    x = 60,114.20

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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.