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Finding the Fourth Proportional to 103,239.58, 142,520.68 and 69,235.68

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Solution

The fourth proportional to 103,239.58, 142,520.68 and 69,235.68 is: 95,578.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,239.58 : 142,520.68 = 69,235.68 : x
  2. Step 2: Convert to fraction form
    103,239.58/142,520.68 = 69,235.68/x
  3. Step 3: Cross multiply
    103,239.58x = 142,520.68 × 69,235.68
  4. Step 4: Simplify right side
    103,239.58x = 9,867,516,193.86
  5. Step 5: Solve for x
    x = 9,867,516,193.86/103,239.58
  6. Step 6: Final answer
    x = 95,578.81

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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.