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Finding the Fourth Proportional to 103,744.68, 143,238.29 and 79,502.73

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Solution

The fourth proportional to 103,744.68, 143,238.29 and 79,502.73 is: 109,767.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,744.68 : 143,238.29 = 79,502.73 : x
  2. Step 2: Convert to fraction form
    103,744.68/143,238.29 = 79,502.73/x
  3. Step 3: Cross multiply
    103,744.68x = 143,238.29 × 79,502.73
  4. Step 4: Simplify right side
    103,744.68x = 11,387,834,698.02
  5. Step 5: Solve for x
    x = 11,387,834,698.02/103,744.68
  6. Step 6: Final answer
    x = 109,767.89

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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.