Home / 156,521.78-215,999.28-87,611.57

Finding the Fourth Proportional to 156,521.78, 215,999.28 and 87,611.57

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Solution

The fourth proportional to 156,521.78, 215,999.28 and 87,611.57 is: 120,903.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,521.78 : 215,999.28 = 87,611.57 : x
  2. Step 2: Convert to fraction form
    156,521.78/215,999.28 = 87,611.57/x
  3. Step 3: Cross multiply
    156,521.78x = 215,999.28 × 87,611.57
  4. Step 4: Simplify right side
    156,521.78x = 18,924,034,959.67
  5. Step 5: Solve for x
    x = 18,924,034,959.67/156,521.78
  6. Step 6: Final answer
    x = 120,903.53

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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.