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Finding the Fourth Proportional to 128,079.56, 192,119.34 and 65,710.28

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Solution

The fourth proportional to 128,079.56, 192,119.34 and 65,710.28 is: 98,565.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,079.56 : 192,119.34 = 65,710.28 : x
  2. Step 2: Convert to fraction form
    128,079.56/192,119.34 = 65,710.28/x
  3. Step 3: Cross multiply
    128,079.56x = 192,119.34 × 65,710.28
  4. Step 4: Simplify right side
    128,079.56x = 12,624,215,624.82
  5. Step 5: Solve for x
    x = 12,624,215,624.82/128,079.56
  6. Step 6: Final answer
    x = 98,565.42

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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.