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Finding the Fourth Proportional to 79,689.67, 118,951.45 and 70,231.45

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Solution

The fourth proportional to 79,689.67, 118,951.45 and 70,231.45 is: 104,833.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.67 : 118,951.45 = 70,231.45 : x
  2. Step 2: Convert to fraction form
    79,689.67/118,951.45 = 70,231.45/x
  3. Step 3: Cross multiply
    79,689.67x = 118,951.45 × 70,231.45
  4. Step 4: Simplify right side
    79,689.67x = 8,354,132,813.10
  5. Step 5: Solve for x
    x = 8,354,132,813.10/79,689.67
  6. Step 6: Final answer
    x = 104,833.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.