Home / 156,138.50-215,458.58-88,172.01

Finding the Fourth Proportional to 156,138.50, 215,458.58 and 88,172.01

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Solution

The fourth proportional to 156,138.50, 215,458.58 and 88,172.01 is: 121,670.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,138.50 : 215,458.58 = 88,172.01 : x
  2. Step 2: Convert to fraction form
    156,138.50/215,458.58 = 88,172.01/x
  3. Step 3: Cross multiply
    156,138.50x = 215,458.58 × 88,172.01
  4. Step 4: Simplify right side
    156,138.50x = 18,997,416,290.78
  5. Step 5: Solve for x
    x = 18,997,416,290.78/156,138.50
  6. Step 6: Final answer
    x = 121,670.29

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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.