Home / 100,857.18-139,181.76-55,534.22

Finding the Fourth Proportional to 100,857.18, 139,181.76 and 55,534.22

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Solution

The fourth proportional to 100,857.18, 139,181.76 and 55,534.22 is: 76,636.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.18 : 139,181.76 = 55,534.22 : x
  2. Step 2: Convert to fraction form
    100,857.18/139,181.76 = 55,534.22/x
  3. Step 3: Cross multiply
    100,857.18x = 139,181.76 × 55,534.22
  4. Step 4: Simplify right side
    100,857.18x = 7,729,350,479.83
  5. Step 5: Solve for x
    x = 7,729,350,479.83/100,857.18
  6. Step 6: Final answer
    x = 76,636.59

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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.