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Finding the Fourth Proportional to 101,115.30, 139,538.08 and 55,794.18

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Solution

The fourth proportional to 101,115.30, 139,538.08 and 55,794.18 is: 76,995.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,115.30 : 139,538.08 = 55,794.18 : x
  2. Step 2: Convert to fraction form
    101,115.30/139,538.08 = 55,794.18/x
  3. Step 3: Cross multiply
    101,115.30x = 139,538.08 × 55,794.18
  4. Step 4: Simplify right side
    101,115.30x = 7,785,412,612.89
  5. Step 5: Solve for x
    x = 7,785,412,612.89/101,115.30
  6. Step 6: Final answer
    x = 76,995.40

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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.