Home / 72,789.45-100,412.64-42,555.06

Finding the Fourth Proportional to 72,789.45, 100,412.64 and 42,555.06

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Solution

The fourth proportional to 72,789.45, 100,412.64 and 42,555.06 is: 58,704.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,789.45 : 100,412.64 = 42,555.06 : x
  2. Step 2: Convert to fraction form
    72,789.45/100,412.64 = 42,555.06/x
  3. Step 3: Cross multiply
    72,789.45x = 100,412.64 × 42,555.06
  4. Step 4: Simplify right side
    72,789.45x = 4,273,065,919.96
  5. Step 5: Solve for x
    x = 4,273,065,919.96/72,789.45
  6. Step 6: Final answer
    x = 58,704.47

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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.