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Finding the Fourth Proportional to 68,435.21, 93,754.67 and 65,876.69

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Solution

The fourth proportional to 68,435.21, 93,754.67 and 65,876.69 is: 90,249.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,435.21 : 93,754.67 = 65,876.69 : x
  2. Step 2: Convert to fraction form
    68,435.21/93,754.67 = 65,876.69/x
  3. Step 3: Cross multiply
    68,435.21x = 93,754.67 × 65,876.69
  4. Step 4: Simplify right side
    68,435.21x = 6,176,246,533.49
  5. Step 5: Solve for x
    x = 6,176,246,533.49/68,435.21
  6. Step 6: Final answer
    x = 90,249.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.