Home / 100,814.68-139,122.12-55,490.32

Finding the Fourth Proportional to 100,814.68, 139,122.12 and 55,490.32

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Solution

The fourth proportional to 100,814.68, 139,122.12 and 55,490.32 is: 76,575.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,814.68 : 139,122.12 = 55,490.32 : x
  2. Step 2: Convert to fraction form
    100,814.68/139,122.12 = 55,490.32/x
  3. Step 3: Cross multiply
    100,814.68x = 139,122.12 × 55,490.32
  4. Step 4: Simplify right side
    100,814.68x = 7,719,930,957.88
  5. Step 5: Solve for x
    x = 7,719,930,957.88/100,814.68
  6. Step 6: Final answer
    x = 76,575.46

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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.