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Finding the Fourth Proportional to 100,805.22, 139,087.47 and 84,733.62

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Solution

The fourth proportional to 100,805.22, 139,087.47 and 84,733.62 is: 116,912.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,805.22 : 139,087.47 = 84,733.62 : x
  2. Step 2: Convert to fraction form
    100,805.22/139,087.47 = 84,733.62/x
  3. Step 3: Cross multiply
    100,805.22x = 139,087.47 × 84,733.62
  4. Step 4: Simplify right side
    100,805.22x = 11,785,384,829.74
  5. Step 5: Solve for x
    x = 11,785,384,829.74/100,805.22
  6. Step 6: Final answer
    x = 116,912.45

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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.