Home / 155,216.20-214,216.12-86,312.56

Finding the Fourth Proportional to 155,216.20, 214,216.12 and 86,312.56

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Solution

The fourth proportional to 155,216.20, 214,216.12 and 86,312.56 is: 119,121.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,216.20 : 214,216.12 = 86,312.56 : x
  2. Step 2: Convert to fraction form
    155,216.20/214,216.12 = 86,312.56/x
  3. Step 3: Cross multiply
    155,216.20x = 214,216.12 × 86,312.56
  4. Step 4: Simplify right side
    155,216.20x = 18,489,541,710.47
  5. Step 5: Solve for x
    x = 18,489,541,710.47/155,216.20
  6. Step 6: Final answer
    x = 119,121.21

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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.