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Finding the Fourth Proportional to 111,079.87, 153,130.77 and 79,193.41

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Solution

The fourth proportional to 111,079.87, 153,130.77 and 79,193.41 is: 109,173.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,079.87 : 153,130.77 = 79,193.41 : x
  2. Step 2: Convert to fraction form
    111,079.87/153,130.77 = 79,193.41/x
  3. Step 3: Cross multiply
    111,079.87x = 153,130.77 × 79,193.41
  4. Step 4: Simplify right side
    111,079.87x = 12,126,947,852.23
  5. Step 5: Solve for x
    x = 12,126,947,852.23/111,079.87
  6. Step 6: Final answer
    x = 109,173.23

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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.