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Finding the Fourth Proportional to 108,420.80, 162,400.80 and 89,988.80

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Solution

The fourth proportional to 108,420.80, 162,400.80 and 89,988.80 is: 134,791.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,420.80 : 162,400.80 = 89,988.80 : x
  2. Step 2: Convert to fraction form
    108,420.80/162,400.80 = 89,988.80/x
  3. Step 3: Cross multiply
    108,420.80x = 162,400.80 × 89,988.80
  4. Step 4: Simplify right side
    108,420.80x = 14,614,253,111.04
  5. Step 5: Solve for x
    x = 14,614,253,111.04/108,420.80
  6. Step 6: Final answer
    x = 134,791.97

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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.