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Finding the Fourth Proportional to 199,903,842.48, 299,862,401.52 and 68,744,831.28

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Solution

The fourth proportional to 199,903,842.48, 299,862,401.52 and 68,744,831.28 is: 103,119,529.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,903,842.48 : 299,862,401.52 = 68,744,831.28 : x
  2. Step 2: Convert to fraction form
    199,903,842.48/299,862,401.52 = 68,744,831.28/x
  3. Step 3: Cross multiply
    199,903,842.48x = 299,862,401.52 × 68,744,831.28
  4. Step 4: Simplify right side
    199,903,842.48x = 20,613,990,199,708,016
  5. Step 5: Solve for x
    x = 20,613,990,199,708,016/199,903,842.48
  6. Step 6: Final answer
    x = 103,119,529.59

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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.