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Finding the Fourth Proportional to 108,959.80, 163,439.70 and 38,813.80

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Solution

The fourth proportional to 108,959.80, 163,439.70 and 38,813.80 is: 58,220.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,959.80 : 163,439.70 = 38,813.80 : x
  2. Step 2: Convert to fraction form
    108,959.80/163,439.70 = 38,813.80/x
  3. Step 3: Cross multiply
    108,959.80x = 163,439.70 × 38,813.80
  4. Step 4: Simplify right side
    108,959.80x = 6,343,715,827.86
  5. Step 5: Solve for x
    x = 6,343,715,827.86/108,959.80
  6. Step 6: Final answer
    x = 58,220.70

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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.