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Finding the Fourth Proportional to 132,039.20, 198,058.80 and 69,831.20

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Solution

The fourth proportional to 132,039.20, 198,058.80 and 69,831.20 is: 104,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,039.20 : 198,058.80 = 69,831.20 : x
  2. Step 2: Convert to fraction form
    132,039.20/198,058.80 = 69,831.20/x
  3. Step 3: Cross multiply
    132,039.20x = 198,058.80 × 69,831.20
  4. Step 4: Simplify right side
    132,039.20x = 13,830,683,674.56
  5. Step 5: Solve for x
    x = 13,830,683,674.56/132,039.20
  6. Step 6: Final answer
    x = 104,746.80

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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.