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Finding the Fourth Proportional to 71,404.64, 98,534.80 and 39,578.34

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Solution

The fourth proportional to 71,404.64, 98,534.80 and 39,578.34 is: 54,616.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,404.64 : 98,534.80 = 39,578.34 : x
  2. Step 2: Convert to fraction form
    71,404.64/98,534.80 = 39,578.34/x
  3. Step 3: Cross multiply
    71,404.64x = 98,534.80 × 39,578.34
  4. Step 4: Simplify right side
    71,404.64x = 3,899,843,816.23
  5. Step 5: Solve for x
    x = 3,899,843,816.23/71,404.64
  6. Step 6: Final answer
    x = 54,616.11

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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.