Home / 42,750.87-64,133.20-13,168.70

Finding the Fourth Proportional to 42,750.87, 64,133.20 and 13,168.70

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Solution

The fourth proportional to 42,750.87, 64,133.20 and 13,168.70 is: 19,755.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,750.87 : 64,133.20 = 13,168.70 : x
  2. Step 2: Convert to fraction form
    42,750.87/64,133.20 = 13,168.70/x
  3. Step 3: Cross multiply
    42,750.87x = 64,133.20 × 13,168.70
  4. Step 4: Simplify right side
    42,750.87x = 844,550,550.17
  5. Step 5: Solve for x
    x = 844,550,550.17/42,750.87
  6. Step 6: Final answer
    x = 19,755.17

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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.