Home / 72,785.80-109,131.45-28,417.15

Finding the Fourth Proportional to 72,785.80, 109,131.45 and 28,417.15

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Solution

The fourth proportional to 72,785.80, 109,131.45 and 28,417.15 is: 42,607.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,785.80 : 109,131.45 = 28,417.15 : x
  2. Step 2: Convert to fraction form
    72,785.80/109,131.45 = 28,417.15/x
  3. Step 3: Cross multiply
    72,785.80x = 109,131.45 × 28,417.15
  4. Step 4: Simplify right side
    72,785.80x = 3,101,204,784.37
  5. Step 5: Solve for x
    x = 3,101,204,784.37/72,785.80
  6. Step 6: Final answer
    x = 42,607.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.