Home / 171,378.15-257,119.74-76,688.03

Finding the Fourth Proportional to 171,378.15, 257,119.74 and 76,688.03

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Solution

The fourth proportional to 171,378.15, 257,119.74 and 76,688.03 is: 115,055.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,378.15 : 257,119.74 = 76,688.03 : x
  2. Step 2: Convert to fraction form
    171,378.15/257,119.74 = 76,688.03/x
  3. Step 3: Cross multiply
    171,378.15x = 257,119.74 × 76,688.03
  4. Step 4: Simplify right side
    171,378.15x = 19,718,005,049.11
  5. Step 5: Solve for x
    x = 19,718,005,049.11/171,378.15
  6. Step 6: Final answer
    x = 115,055.54

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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.