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Finding the Fourth Proportional to 100,886.53, 139,213.11 and 62,118.19

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Solution

The fourth proportional to 100,886.53, 139,213.11 and 62,118.19 is: 85,716.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,886.53 : 139,213.11 = 62,118.19 : x
  2. Step 2: Convert to fraction form
    100,886.53/139,213.11 = 62,118.19/x
  3. Step 3: Cross multiply
    100,886.53x = 139,213.11 × 62,118.19
  4. Step 4: Simplify right side
    100,886.53x = 8,647,666,417.47
  5. Step 5: Solve for x
    x = 8,647,666,417.47/100,886.53
  6. Step 6: Final answer
    x = 85,716.76

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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.