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Finding the Fourth Proportional to 101,322.81, 139,825.71 and 55,999.80

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Solution

The fourth proportional to 101,322.81, 139,825.71 and 55,999.80 is: 77,279.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,322.81 : 139,825.71 = 55,999.80 : x
  2. Step 2: Convert to fraction form
    101,322.81/139,825.71 = 55,999.80/x
  3. Step 3: Cross multiply
    101,322.81x = 139,825.71 × 55,999.80
  4. Step 4: Simplify right side
    101,322.81x = 7,830,211,794.86
  5. Step 5: Solve for x
    x = 7,830,211,794.86/101,322.81
  6. Step 6: Final answer
    x = 77,279.85

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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.