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Finding the Fourth Proportional to 67,007.57, 100,507.68 and 19,620.77

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Solution

The fourth proportional to 67,007.57, 100,507.68 and 19,620.77 is: 29,430.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,007.57 : 100,507.68 = 19,620.77 : x
  2. Step 2: Convert to fraction form
    67,007.57/100,507.68 = 19,620.77/x
  3. Step 3: Cross multiply
    67,007.57x = 100,507.68 × 19,620.77
  4. Step 4: Simplify right side
    67,007.57x = 1,972,037,569.98
  5. Step 5: Solve for x
    x = 1,972,037,569.98/67,007.57
  6. Step 6: Final answer
    x = 29,430.07

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1.5x scale

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.