Home / 156,340.20-215,739.24-99,745.50

Finding the Fourth Proportional to 156,340.20, 215,739.24 and 99,745.50

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Solution

The fourth proportional to 156,340.20, 215,739.24 and 99,745.50 is: 137,642.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,340.20 : 215,739.24 = 99,745.50 : x
  2. Step 2: Convert to fraction form
    156,340.20/215,739.24 = 99,745.50/x
  3. Step 3: Cross multiply
    156,340.20x = 215,739.24 × 99,745.50
  4. Step 4: Simplify right side
    156,340.20x = 21,519,018,363.42
  5. Step 5: Solve for x
    x = 21,519,018,363.42/156,340.20
  6. Step 6: Final answer
    x = 137,642.26

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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.