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Finding the Fourth Proportional to 90,641.94, 125,119.57 and 77,843.74

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Solution

The fourth proportional to 90,641.94, 125,119.57 and 77,843.74 is: 107,453.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,641.94 : 125,119.57 = 77,843.74 : x
  2. Step 2: Convert to fraction form
    90,641.94/125,119.57 = 77,843.74/x
  3. Step 3: Cross multiply
    90,641.94x = 125,119.57 × 77,843.74
  4. Step 4: Simplify right side
    90,641.94x = 9,739,775,275.99
  5. Step 5: Solve for x
    x = 9,739,775,275.99/90,641.94
  6. Step 6: Final answer
    x = 107,453.30

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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.