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Finding the Fourth Proportional to 66,984.91, 92,435.83 and 38,688.91

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Solution

The fourth proportional to 66,984.91, 92,435.83 and 38,688.91 is: 53,388.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,984.91 : 92,435.83 = 38,688.91 : x
  2. Step 2: Convert to fraction form
    66,984.91/92,435.83 = 38,688.91/x
  3. Step 3: Cross multiply
    66,984.91x = 92,435.83 × 38,688.91
  4. Step 4: Simplify right side
    66,984.91x = 3,576,241,507.65
  5. Step 5: Solve for x
    x = 3,576,241,507.65/66,984.91
  6. Step 6: Final answer
    x = 53,388.76

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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.