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Finding the Fourth Proportional to 100,964.67, 139,329.27 and 55,646.70

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Solution

The fourth proportional to 100,964.67, 139,329.27 and 55,646.70 is: 76,791.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,964.67 : 139,329.27 = 55,646.70 : x
  2. Step 2: Convert to fraction form
    100,964.67/139,329.27 = 55,646.70/x
  3. Step 3: Cross multiply
    100,964.67x = 139,329.27 × 55,646.70
  4. Step 4: Simplify right side
    100,964.67x = 7,753,214,088.91
  5. Step 5: Solve for x
    x = 7,753,214,088.91/100,964.67
  6. Step 6: Final answer
    x = 76,791.36

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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.