Home / 100,928.03-139,275.09-55,597.10

Finding the Fourth Proportional to 100,928.03, 139,275.09 and 55,597.10

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Solution

The fourth proportional to 100,928.03, 139,275.09 and 55,597.10 is: 76,720.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,928.03 : 139,275.09 = 55,597.10 : x
  2. Step 2: Convert to fraction form
    100,928.03/139,275.09 = 55,597.10/x
  3. Step 3: Cross multiply
    100,928.03x = 139,275.09 × 55,597.10
  4. Step 4: Simplify right side
    100,928.03x = 7,743,290,409.86
  5. Step 5: Solve for x
    x = 7,743,290,409.86/100,928.03
  6. Step 6: Final answer
    x = 76,720.91

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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.