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Finding the Fourth Proportional to 103,440.25, 142,747.68 and 58,728.25

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Solution

The fourth proportional to 103,440.25, 142,747.68 and 58,728.25 is: 81,045.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,440.25 : 142,747.68 = 58,728.25 : x
  2. Step 2: Convert to fraction form
    103,440.25/142,747.68 = 58,728.25/x
  3. Step 3: Cross multiply
    103,440.25x = 142,747.68 × 58,728.25
  4. Step 4: Simplify right side
    103,440.25x = 8,383,321,437.96
  5. Step 5: Solve for x
    x = 8,383,321,437.96/103,440.25
  6. Step 6: Final answer
    x = 81,045.06

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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.