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Finding the Fourth Proportional to 153,499.86, 211,836.33 and 85,516.79

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Solution

The fourth proportional to 153,499.86, 211,836.33 and 85,516.79 is: 118,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,499.86 : 211,836.33 = 85,516.79 : x
  2. Step 2: Convert to fraction form
    153,499.86/211,836.33 = 85,516.79/x
  3. Step 3: Cross multiply
    153,499.86x = 211,836.33 × 85,516.79
  4. Step 4: Simplify right side
    153,499.86x = 18,115,562,946.98
  5. Step 5: Solve for x
    x = 18,115,562,946.98/153,499.86
  6. Step 6: Final answer
    x = 118,016.80

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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.