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Finding the Fourth Proportional to 108,854.38, 163,106.70 and 91,358.38

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Solution

The fourth proportional to 108,854.38, 163,106.70 and 91,358.38 is: 136,890.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,854.38 : 163,106.70 = 91,358.38 : x
  2. Step 2: Convert to fraction form
    108,854.38/163,106.70 = 91,358.38/x
  3. Step 3: Cross multiply
    108,854.38x = 163,106.70 × 91,358.38
  4. Step 4: Simplify right side
    108,854.38x = 14,901,163,879.15
  5. Step 5: Solve for x
    x = 14,901,163,879.15/108,854.38
  6. Step 6: Final answer
    x = 136,890.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.