Home / 128,731.20-193,096.80-58,747.20

Finding the Fourth Proportional to 128,731.20, 193,096.80 and 58,747.20

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Solution

The fourth proportional to 128,731.20, 193,096.80 and 58,747.20 is: 88,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,731.20 : 193,096.80 = 58,747.20 : x
  2. Step 2: Convert to fraction form
    128,731.20/193,096.80 = 58,747.20/x
  3. Step 3: Cross multiply
    128,731.20x = 193,096.80 × 58,747.20
  4. Step 4: Simplify right side
    128,731.20x = 11,343,896,328.96
  5. Step 5: Solve for x
    x = 11,343,896,328.96/128,731.20
  6. Step 6: Final answer
    x = 88,120.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.