Home / 170,621.15-256,088.79-86,439.87

Finding the Fourth Proportional to 170,621.15, 256,088.79 and 86,439.87

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Solution

The fourth proportional to 170,621.15, 256,088.79 and 86,439.87 is: 129,739.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,621.15 : 256,088.79 = 86,439.87 : x
  2. Step 2: Convert to fraction form
    170,621.15/256,088.79 = 86,439.87/x
  3. Step 3: Cross multiply
    170,621.15x = 256,088.79 × 86,439.87
  4. Step 4: Simplify right side
    170,621.15x = 22,136,281,716.06
  5. Step 5: Solve for x
    x = 22,136,281,716.06/170,621.15
  6. Step 6: Final answer
    x = 129,739.38

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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.