Home / 81,178.04-121,762.20-33,781.16

Finding the Fourth Proportional to 81,178.04, 121,762.20 and 33,781.16

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Solution

The fourth proportional to 81,178.04, 121,762.20 and 33,781.16 is: 50,669.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,178.04 : 121,762.20 = 33,781.16 : x
  2. Step 2: Convert to fraction form
    81,178.04/121,762.20 = 33,781.16/x
  3. Step 3: Cross multiply
    81,178.04x = 121,762.20 × 33,781.16
  4. Step 4: Simplify right side
    81,178.04x = 4,113,268,360.15
  5. Step 5: Solve for x
    x = 4,113,268,360.15/81,178.04
  6. Step 6: Final answer
    x = 50,669.72

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1.5x scale

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.