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Finding the Fourth Proportional to 71,460.90, 98,609.58 and 39,629.70

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Solution

The fourth proportional to 71,460.90, 98,609.58 and 39,629.70 is: 54,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,460.90 : 98,609.58 = 39,629.70 : x
  2. Step 2: Convert to fraction form
    71,460.90/98,609.58 = 39,629.70/x
  3. Step 3: Cross multiply
    71,460.90x = 98,609.58 × 39,629.70
  4. Step 4: Simplify right side
    71,460.90x = 3,907,868,072.53
  5. Step 5: Solve for x
    x = 3,907,868,072.53/71,460.90
  6. Step 6: Final answer
    x = 54,685.40

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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.