Home / 115,121.60-172,336.80-68,350.40

Finding the Fourth Proportional to 115,121.60, 172,336.80 and 68,350.40

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Solution

The fourth proportional to 115,121.60, 172,336.80 and 68,350.40 is: 102,320.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,121.60 : 172,336.80 = 68,350.40 : x
  2. Step 2: Convert to fraction form
    115,121.60/172,336.80 = 68,350.40/x
  3. Step 3: Cross multiply
    115,121.60x = 172,336.80 × 68,350.40
  4. Step 4: Simplify right side
    115,121.60x = 11,779,289,214.72
  5. Step 5: Solve for x
    x = 11,779,289,214.72/115,121.60
  6. Step 6: Final answer
    x = 102,320.41

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1.5x scale

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.