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Finding the Fourth Proportional to 103,518.82, 142,926.79 and 79,277.01

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Solution

The fourth proportional to 103,518.82, 142,926.79 and 79,277.01 is: 109,456.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,518.82 : 142,926.79 = 79,277.01 : x
  2. Step 2: Convert to fraction form
    103,518.82/142,926.79 = 79,277.01/x
  3. Step 3: Cross multiply
    103,518.82x = 142,926.79 × 79,277.01
  4. Step 4: Simplify right side
    103,518.82x = 11,330,808,560.10
  5. Step 5: Solve for x
    x = 11,330,808,560.10/103,518.82
  6. Step 6: Final answer
    x = 109,456.51

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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.