Home / 143,728.96-198,305.76-87,102.40

Finding the Fourth Proportional to 143,728.96, 198,305.76 and 87,102.40

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Solution

The fourth proportional to 143,728.96, 198,305.76 and 87,102.40 is: 120,176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,728.96 : 198,305.76 = 87,102.40 : x
  2. Step 2: Convert to fraction form
    143,728.96/198,305.76 = 87,102.40/x
  3. Step 3: Cross multiply
    143,728.96x = 198,305.76 × 87,102.40
  4. Step 4: Simplify right side
    143,728.96x = 17,272,907,629.82
  5. Step 5: Solve for x
    x = 17,272,907,629.82/143,728.96
  6. Step 6: Final answer
    x = 120,176.95

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1.5x scale

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.