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Finding the Fourth Proportional to 108,657.79, 149,979.03 and 65,630.45

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Solution

The fourth proportional to 108,657.79, 149,979.03 and 65,630.45 is: 90,588.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,657.79 : 149,979.03 = 65,630.45 : x
  2. Step 2: Convert to fraction form
    108,657.79/149,979.03 = 65,630.45/x
  3. Step 3: Cross multiply
    108,657.79x = 149,979.03 × 65,630.45
  4. Step 4: Simplify right side
    108,657.79x = 9,843,190,233.45
  5. Step 5: Solve for x
    x = 9,843,190,233.45/108,657.79
  6. Step 6: Final answer
    x = 90,588.90

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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.