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Finding the Fourth Proportional to 103,609.78, 142,968.04 and 58,286.24

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Solution

The fourth proportional to 103,609.78, 142,968.04 and 58,286.24 is: 80,427.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,609.78 : 142,968.04 = 58,286.24 : x
  2. Step 2: Convert to fraction form
    103,609.78/142,968.04 = 58,286.24/x
  3. Step 3: Cross multiply
    103,609.78x = 142,968.04 × 58,286.24
  4. Step 4: Simplify right side
    103,609.78x = 8,333,069,491.77
  5. Step 5: Solve for x
    x = 8,333,069,491.77/103,609.78
  6. Step 6: Final answer
    x = 80,427.44

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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.