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Finding the Fourth Proportional to 156,026.78, 215,316.84 and 84,406.86

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Solution

The fourth proportional to 156,026.78, 215,316.84 and 84,406.86 is: 116,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,026.78 : 215,316.84 = 84,406.86 : x
  2. Step 2: Convert to fraction form
    156,026.78/215,316.84 = 84,406.86/x
  3. Step 3: Cross multiply
    156,026.78x = 215,316.84 × 84,406.86
  4. Step 4: Simplify right side
    156,026.78x = 18,174,218,369.52
  5. Step 5: Solve for x
    x = 18,174,218,369.52/156,026.78
  6. Step 6: Final answer
    x = 116,481.40

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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.