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Finding the Fourth Proportional to 71,547.09, 107,331.93 and 21,621.03

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Solution

The fourth proportional to 71,547.09, 107,331.93 and 21,621.03 is: 32,434.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,547.09 : 107,331.93 = 21,621.03 : x
  2. Step 2: Convert to fraction form
    71,547.09/107,331.93 = 21,621.03/x
  3. Step 3: Cross multiply
    71,547.09x = 107,331.93 × 21,621.03
  4. Step 4: Simplify right side
    71,547.09x = 2,320,626,878.49
  5. Step 5: Solve for x
    x = 2,320,626,878.49/71,547.09
  6. Step 6: Final answer
    x = 32,434.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.