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Finding the Fourth Proportional to 100,913.67, 139,250.39 and 62,145.32

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Solution

The fourth proportional to 100,913.67, 139,250.39 and 62,145.32 is: 85,754.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,913.67 : 139,250.39 = 62,145.32 : x
  2. Step 2: Convert to fraction form
    100,913.67/139,250.39 = 62,145.32/x
  3. Step 3: Cross multiply
    100,913.67x = 139,250.39 × 62,145.32
  4. Step 4: Simplify right side
    100,913.67x = 8,653,759,039.70
  5. Step 5: Solve for x
    x = 8,653,759,039.70/100,913.67
  6. Step 6: Final answer
    x = 85,754.08

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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.