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Finding the Fourth Proportional to 113,220.80, 169,831.20 and 102,723.20

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Solution

The fourth proportional to 113,220.80, 169,831.20 and 102,723.20 is: 154,084.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,220.80 : 169,831.20 = 102,723.20 : x
  2. Step 2: Convert to fraction form
    113,220.80/169,831.20 = 102,723.20/x
  3. Step 3: Cross multiply
    113,220.80x = 169,831.20 × 102,723.20
  4. Step 4: Simplify right side
    113,220.80x = 17,445,604,323.84
  5. Step 5: Solve for x
    x = 17,445,604,323.84/113,220.80
  6. Step 6: Final answer
    x = 154,084.80

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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.