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Finding the Fourth Proportional to 100,992.78, 139,368.87 and 58,555.26

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Solution

The fourth proportional to 100,992.78, 139,368.87 and 58,555.26 is: 80,805.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,992.78 : 139,368.87 = 58,555.26 : x
  2. Step 2: Convert to fraction form
    100,992.78/139,368.87 = 58,555.26/x
  3. Step 3: Cross multiply
    100,992.78x = 139,368.87 × 58,555.26
  4. Step 4: Simplify right side
    100,992.78x = 8,160,780,418.76
  5. Step 5: Solve for x
    x = 8,160,780,418.76/100,992.78
  6. Step 6: Final answer
    x = 80,805.58

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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.