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Finding the Fourth Proportional to 100,754.24, 139,040.84 and 55,431.24

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Solution

The fourth proportional to 100,754.24, 139,040.84 and 55,431.24 is: 76,495.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,754.24 : 139,040.84 = 55,431.24 : x
  2. Step 2: Convert to fraction form
    100,754.24/139,040.84 = 55,431.24/x
  3. Step 3: Cross multiply
    100,754.24x = 139,040.84 × 55,431.24
  4. Step 4: Simplify right side
    100,754.24x = 7,707,205,894.69
  5. Step 5: Solve for x
    x = 7,707,205,894.69/100,754.24
  6. Step 6: Final answer
    x = 76,495.10

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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.