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Finding the Fourth Proportional to 71,455.90, 98,613.08 and 39,624.12

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Solution

The fourth proportional to 71,455.90, 98,613.08 and 39,624.12 is: 54,683.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,455.90 : 98,613.08 = 39,624.12 : x
  2. Step 2: Convert to fraction form
    71,455.90/98,613.08 = 39,624.12/x
  3. Step 3: Cross multiply
    71,455.90x = 98,613.08 × 39,624.12
  4. Step 4: Simplify right side
    71,455.90x = 3,907,456,515.49
  5. Step 5: Solve for x
    x = 3,907,456,515.49/71,455.90
  6. Step 6: Final answer
    x = 54,683.47

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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.