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Finding the Fourth Proportional to 100,757.74, 139,063.08 and 58,339.66

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Solution

The fourth proportional to 100,757.74, 139,063.08 and 58,339.66 is: 80,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,757.74 : 139,063.08 = 58,339.66 : x
  2. Step 2: Convert to fraction form
    100,757.74/139,063.08 = 58,339.66/x
  3. Step 3: Cross multiply
    100,757.74x = 139,063.08 × 58,339.66
  4. Step 4: Simplify right side
    100,757.74x = 8,112,892,805.75
  5. Step 5: Solve for x
    x = 8,112,892,805.75/100,757.74
  6. Step 6: Final answer
    x = 80,518.80

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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.