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Finding the Fourth Proportional to 58,638.80, 80,921.23 and 31,781.03

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Solution

The fourth proportional to 58,638.80, 80,921.23 and 31,781.03 is: 43,857.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,638.80 : 80,921.23 = 31,781.03 : x
  2. Step 2: Convert to fraction form
    58,638.80/80,921.23 = 31,781.03/x
  3. Step 3: Cross multiply
    58,638.80x = 80,921.23 × 31,781.03
  4. Step 4: Simplify right side
    58,638.80x = 2,571,759,554.21
  5. Step 5: Solve for x
    x = 2,571,759,554.21/58,638.80
  6. Step 6: Final answer
    x = 43,857.64

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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.