Home / 115,038.24-172,542.56-85,499.12

Finding the Fourth Proportional to 115,038.24, 172,542.56 and 85,499.12

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Solution

The fourth proportional to 115,038.24, 172,542.56 and 85,499.12 is: 128,237.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,038.24 : 172,542.56 = 85,499.12 : x
  2. Step 2: Convert to fraction form
    115,038.24/172,542.56 = 85,499.12/x
  3. Step 3: Cross multiply
    115,038.24x = 172,542.56 × 85,499.12
  4. Step 4: Simplify right side
    115,038.24x = 14,752,237,042.55
  5. Step 5: Solve for x
    x = 14,752,237,042.55/115,038.24
  6. Step 6: Final answer
    x = 128,237.68

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1.5x scale

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.