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Finding the Fourth Proportional to 55,810.88, 77,019 and 30,660.36

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Solution

The fourth proportional to 55,810.88, 77,019 and 30,660.36 is: 42,311.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,810.88 : 77,019 = 30,660.36 : x
  2. Step 2: Convert to fraction form
    55,810.88/77,019 = 30,660.36/x
  3. Step 3: Cross multiply
    55,810.88x = 77,019 × 30,660.36
  4. Step 4: Simplify right side
    55,810.88x = 2,361,430,266.84
  5. Step 5: Solve for x
    x = 2,361,430,266.84/55,810.88
  6. Step 6: Final answer
    x = 42,311.29

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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.