Home / 135,115.02-186,470.24-78,522.75

Finding the Fourth Proportional to 135,115.02, 186,470.24 and 78,522.75

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Solution

The fourth proportional to 135,115.02, 186,470.24 and 78,522.75 is: 108,368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,115.02 : 186,470.24 = 78,522.75 : x
  2. Step 2: Convert to fraction form
    135,115.02/186,470.24 = 78,522.75/x
  3. Step 3: Cross multiply
    135,115.02x = 186,470.24 × 78,522.75
  4. Step 4: Simplify right side
    135,115.02x = 14,642,155,645.35
  5. Step 5: Solve for x
    x = 14,642,155,645.35/135,115.02
  6. Step 6: Final answer
    x = 108,368.08

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1.5x scale

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.