Home / 155,991.85-215,271.74-87,995.45

Finding the Fourth Proportional to 155,991.85, 215,271.74 and 87,995.45

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Solution

The fourth proportional to 155,991.85, 215,271.74 and 87,995.45 is: 121,435.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,991.85 : 215,271.74 = 87,995.45 : x
  2. Step 2: Convert to fraction form
    155,991.85/215,271.74 = 87,995.45/x
  3. Step 3: Cross multiply
    155,991.85x = 215,271.74 × 87,995.45
  4. Step 4: Simplify right side
    155,991.85x = 18,942,934,391.75
  5. Step 5: Solve for x
    x = 18,942,934,391.75/155,991.85
  6. Step 6: Final answer
    x = 121,435.41

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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.