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Finding the Fourth Proportional to 71,708.72, 98,931.44 and 43,404.08

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Solution

The fourth proportional to 71,708.72, 98,931.44 and 43,404.08 is: 59,881.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,708.72 : 98,931.44 = 43,404.08 : x
  2. Step 2: Convert to fraction form
    71,708.72/98,931.44 = 43,404.08/x
  3. Step 3: Cross multiply
    71,708.72x = 98,931.44 × 43,404.08
  4. Step 4: Simplify right side
    71,708.72x = 4,294,028,136.28
  5. Step 5: Solve for x
    x = 4,294,028,136.28/71,708.72
  6. Step 6: Final answer
    x = 59,881.53

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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.