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Finding the Fourth Proportional to 71,051.56, 98,053.62 and 39,221.64

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Solution

The fourth proportional to 71,051.56, 98,053.62 and 39,221.64 is: 54,127.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,051.56 : 98,053.62 = 39,221.64 : x
  2. Step 2: Convert to fraction form
    71,051.56/98,053.62 = 39,221.64/x
  3. Step 3: Cross multiply
    71,051.56x = 98,053.62 × 39,221.64
  4. Step 4: Simplify right side
    71,051.56x = 3,845,823,784.34
  5. Step 5: Solve for x
    x = 3,845,823,784.34/71,051.56
  6. Step 6: Final answer
    x = 54,127.23

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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.