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Finding the Fourth Proportional to 108,290.48, 149,422.92 and 99,580.64

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Solution

The fourth proportional to 108,290.48, 149,422.92 and 99,580.64 is: 137,404.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,290.48 : 149,422.92 = 99,580.64 : x
  2. Step 2: Convert to fraction form
    108,290.48/149,422.92 = 99,580.64/x
  3. Step 3: Cross multiply
    108,290.48x = 149,422.92 × 99,580.64
  4. Step 4: Simplify right side
    108,290.48x = 14,879,630,004.27
  5. Step 5: Solve for x
    x = 14,879,630,004.27/108,290.48
  6. Step 6: Final answer
    x = 137,404.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.