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Finding the Fourth Proportional to 101,318.79, 139,822.71 and 55,999.68

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Solution

The fourth proportional to 101,318.79, 139,822.71 and 55,999.68 is: 77,281.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,318.79 : 139,822.71 = 55,999.68 : x
  2. Step 2: Convert to fraction form
    101,318.79/139,822.71 = 55,999.68/x
  3. Step 3: Cross multiply
    101,318.79x = 139,822.71 × 55,999.68
  4. Step 4: Simplify right side
    101,318.79x = 7,830,027,016.73
  5. Step 5: Solve for x
    x = 7,830,027,016.73/101,318.79
  6. Step 6: Final answer
    x = 77,281.09

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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.