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Finding the Fourth Proportional to 71,180.63, 98,220.74 and 39,345.20

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Solution

The fourth proportional to 71,180.63, 98,220.74 and 39,345.20 is: 54,291.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,180.63 : 98,220.74 = 39,345.20 : x
  2. Step 2: Convert to fraction form
    71,180.63/98,220.74 = 39,345.20/x
  3. Step 3: Cross multiply
    71,180.63x = 98,220.74 × 39,345.20
  4. Step 4: Simplify right side
    71,180.63x = 3,864,513,971.62
  5. Step 5: Solve for x
    x = 3,864,513,971.62/71,180.63
  6. Step 6: Final answer
    x = 54,291.66

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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.