Home / 72,910.40-109,361.95-28,545.28

Finding the Fourth Proportional to 72,910.40, 109,361.95 and 28,545.28

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Solution

The fourth proportional to 72,910.40, 109,361.95 and 28,545.28 is: 42,816.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,910.40 : 109,361.95 = 28,545.28 : x
  2. Step 2: Convert to fraction form
    72,910.40/109,361.95 = 28,545.28/x
  3. Step 3: Cross multiply
    72,910.40x = 109,361.95 × 28,545.28
  4. Step 4: Simplify right side
    72,910.40x = 3,121,767,139.33
  5. Step 5: Solve for x
    x = 3,121,767,139.33/72,910.40
  6. Step 6: Final answer
    x = 42,816.49

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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.