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Finding the Fourth Proportional to 101,263.20, 139,739.64 and 55,940.40

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Solution

The fourth proportional to 101,263.20, 139,739.64 and 55,940.40 is: 77,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,263.20 : 139,739.64 = 55,940.40 : x
  2. Step 2: Convert to fraction form
    101,263.20/139,739.64 = 55,940.40/x
  3. Step 3: Cross multiply
    101,263.20x = 139,739.64 × 55,940.40
  4. Step 4: Simplify right side
    101,263.20x = 7,817,091,357.46
  5. Step 5: Solve for x
    x = 7,817,091,357.46/101,263.20
  6. Step 6: Final answer
    x = 77,195.78

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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.