Home / 103,831.20-155,528.10-84,148.20

Finding the Fourth Proportional to 103,831.20, 155,528.10 and 84,148.20

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Solution

The fourth proportional to 103,831.20, 155,528.10 and 84,148.20 is: 126,045.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,831.20 : 155,528.10 = 84,148.20 : x
  2. Step 2: Convert to fraction form
    103,831.20/155,528.10 = 84,148.20/x
  3. Step 3: Cross multiply
    103,831.20x = 155,528.10 × 84,148.20
  4. Step 4: Simplify right side
    103,831.20x = 13,087,409,664.42
  5. Step 5: Solve for x
    x = 13,087,409,664.42/103,831.20
  6. Step 6: Final answer
    x = 126,045.06

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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.