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Finding the Fourth Proportional to 156,380.87, 215,808.90 and 88,393.77

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Solution

The fourth proportional to 156,380.87, 215,808.90 and 88,393.77 is: 121,985.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,380.87 : 215,808.90 = 88,393.77 : x
  2. Step 2: Convert to fraction form
    156,380.87/215,808.90 = 88,393.77/x
  3. Step 3: Cross multiply
    156,380.87x = 215,808.90 × 88,393.77
  4. Step 4: Simplify right side
    156,380.87x = 19,076,162,270.55
  5. Step 5: Solve for x
    x = 19,076,162,270.55/156,380.87
  6. Step 6: Final answer
    x = 121,985.27

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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.