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Finding the Fourth Proportional to 108,913.80, 163,399.84 and 98,503.68

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Solution

The fourth proportional to 108,913.80, 163,399.84 and 98,503.68 is: 147,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,913.80 : 163,399.84 = 98,503.68 : x
  2. Step 2: Convert to fraction form
    108,913.80/163,399.84 = 98,503.68/x
  3. Step 3: Cross multiply
    108,913.80x = 163,399.84 × 98,503.68
  4. Step 4: Simplify right side
    108,913.80x = 16,095,485,551.41
  5. Step 5: Solve for x
    x = 16,095,485,551.41/108,913.80
  6. Step 6: Final answer
    x = 147,781.87

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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.