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Finding the Fourth Proportional to 156,302, 215,701.18 and 88,321.86

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Solution

The fourth proportional to 156,302, 215,701.18 and 88,321.86 is: 121,886.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,302 : 215,701.18 = 88,321.86 : x
  2. Step 2: Convert to fraction form
    156,302/215,701.18 = 88,321.86/x
  3. Step 3: Cross multiply
    156,302x = 215,701.18 × 88,321.86
  4. Step 4: Simplify right side
    156,302x = 19,051,129,421.79
  5. Step 5: Solve for x
    x = 19,051,129,421.79/156,302
  6. Step 6: Final answer
    x = 121,886.66

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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.