Home / 128,865.56-177,834.30-72,276.44

Finding the Fourth Proportional to 128,865.56, 177,834.30 and 72,276.44

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Solution

The fourth proportional to 128,865.56, 177,834.30 and 72,276.44 is: 99,741.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.56 : 177,834.30 = 72,276.44 : x
  2. Step 2: Convert to fraction form
    128,865.56/177,834.30 = 72,276.44/x
  3. Step 3: Cross multiply
    128,865.56x = 177,834.30 × 72,276.44
  4. Step 4: Simplify right side
    128,865.56x = 12,853,230,113.89
  5. Step 5: Solve for x
    x = 12,853,230,113.89/128,865.56
  6. Step 6: Final answer
    x = 99,741.39

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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.