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Finding the Fourth Proportional to 66,909.65, 92,328.62 and 38,624.45

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Solution

The fourth proportional to 66,909.65, 92,328.62 and 38,624.45 is: 53,297.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,909.65 : 92,328.62 = 38,624.45 : x
  2. Step 2: Convert to fraction form
    66,909.65/92,328.62 = 38,624.45/x
  3. Step 3: Cross multiply
    66,909.65x = 92,328.62 × 38,624.45
  4. Step 4: Simplify right side
    66,909.65x = 3,566,141,511.99
  5. Step 5: Solve for x
    x = 3,566,141,511.99/66,909.65
  6. Step 6: Final answer
    x = 53,297.87

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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.