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Finding the Fourth Proportional to 101,122.80, 139,548.54 and 55,801.20

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Solution

The fourth proportional to 101,122.80, 139,548.54 and 55,801.20 is: 77,005.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,122.80 : 139,548.54 = 55,801.20 : x
  2. Step 2: Convert to fraction form
    101,122.80/139,548.54 = 55,801.20/x
  3. Step 3: Cross multiply
    101,122.80x = 139,548.54 × 55,801.20
  4. Step 4: Simplify right side
    101,122.80x = 7,786,975,990.25
  5. Step 5: Solve for x
    x = 7,786,975,990.25/101,122.80
  6. Step 6: Final answer
    x = 77,005.15

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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.