Home / 100,722.03-139,008.23-57,715.45

Finding the Fourth Proportional to 100,722.03, 139,008.23 and 57,715.45

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Solution

The fourth proportional to 100,722.03, 139,008.23 and 57,715.45 is: 79,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,722.03 : 139,008.23 = 57,715.45 : x
  2. Step 2: Convert to fraction form
    100,722.03/139,008.23 = 57,715.45/x
  3. Step 3: Cross multiply
    100,722.03x = 139,008.23 × 57,715.45
  4. Step 4: Simplify right side
    100,722.03x = 8,022,923,235.06
  5. Step 5: Solve for x
    x = 8,022,923,235.06/100,722.03
  6. Step 6: Final answer
    x = 79,654.10

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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.