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Finding the Fourth Proportional to 128,045.80, 192,062.30 and 65,722.60

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Solution

The fourth proportional to 128,045.80, 192,062.30 and 65,722.60 is: 98,580.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.80 : 192,062.30 = 65,722.60 : x
  2. Step 2: Convert to fraction form
    128,045.80/192,062.30 = 65,722.60/x
  3. Step 3: Cross multiply
    128,045.80x = 192,062.30 × 65,722.60
  4. Step 4: Simplify right side
    128,045.80x = 12,622,833,717.98
  5. Step 5: Solve for x
    x = 12,622,833,717.98/128,045.80
  6. Step 6: Final answer
    x = 98,580.62

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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.