Home / 100,816.60-139,120.32-55,485.76

Finding the Fourth Proportional to 100,816.60, 139,120.32 and 55,485.76

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Solution

The fourth proportional to 100,816.60, 139,120.32 and 55,485.76 is: 76,566.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,816.60 : 139,120.32 = 55,485.76 : x
  2. Step 2: Convert to fraction form
    100,816.60/139,120.32 = 55,485.76/x
  3. Step 3: Cross multiply
    100,816.60x = 139,120.32 × 55,485.76
  4. Step 4: Simplify right side
    100,816.60x = 7,719,196,686.64
  5. Step 5: Solve for x
    x = 7,719,196,686.64/100,816.60
  6. Step 6: Final answer
    x = 76,566.72

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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.