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Finding the Fourth Proportional to 68,690.52, 94,775.22 and 40,390.92

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Solution

The fourth proportional to 68,690.52, 94,775.22 and 40,390.92 is: 55,729.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,690.52 : 94,775.22 = 40,390.92 : x
  2. Step 2: Convert to fraction form
    68,690.52/94,775.22 = 40,390.92/x
  3. Step 3: Cross multiply
    68,690.52x = 94,775.22 × 40,390.92
  4. Step 4: Simplify right side
    68,690.52x = 3,828,058,329.00
  5. Step 5: Solve for x
    x = 3,828,058,329.00/68,690.52
  6. Step 6: Final answer
    x = 55,729.06

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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.