Home / 155,015.83-213,943.24-86,120.74

Finding the Fourth Proportional to 155,015.83, 213,943.24 and 86,120.74

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Solution

The fourth proportional to 155,015.83, 213,943.24 and 86,120.74 is: 118,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,015.83 : 213,943.24 = 86,120.74 : x
  2. Step 2: Convert to fraction form
    155,015.83/213,943.24 = 86,120.74/x
  3. Step 3: Cross multiply
    155,015.83x = 213,943.24 × 86,120.74
  4. Step 4: Simplify right side
    155,015.83x = 18,424,950,146.80
  5. Step 5: Solve for x
    x = 18,424,950,146.80/155,015.83
  6. Step 6: Final answer
    x = 118,858.51

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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.