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Finding the Fourth Proportional to 79,157.34, 109,237.30 and 42,859.14

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Solution

The fourth proportional to 79,157.34, 109,237.30 and 42,859.14 is: 59,145.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,157.34 : 109,237.30 = 42,859.14 : x
  2. Step 2: Convert to fraction form
    79,157.34/109,237.30 = 42,859.14/x
  3. Step 3: Cross multiply
    79,157.34x = 109,237.30 × 42,859.14
  4. Step 4: Simplify right side
    79,157.34x = 4,681,816,733.92
  5. Step 5: Solve for x
    x = 4,681,816,733.92/79,157.34
  6. Step 6: Final answer
    x = 59,145.71

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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.