Home / 109,885.40-164,828.10-71,831.60

Finding the Fourth Proportional to 109,885.40, 164,828.10 and 71,831.60

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Solution

The fourth proportional to 109,885.40, 164,828.10 and 71,831.60 is: 107,747.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,885.40 : 164,828.10 = 71,831.60 : x
  2. Step 2: Convert to fraction form
    109,885.40/164,828.10 = 71,831.60/x
  3. Step 3: Cross multiply
    109,885.40x = 164,828.10 × 71,831.60
  4. Step 4: Simplify right side
    109,885.40x = 11,839,866,147.96
  5. Step 5: Solve for x
    x = 11,839,866,147.96/109,885.40
  6. Step 6: Final answer
    x = 107,747.40

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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.