Home / 103,831.60-155,747.40-68,402.20

Finding the Fourth Proportional to 103,831.60, 155,747.40 and 68,402.20

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Solution

The fourth proportional to 103,831.60, 155,747.40 and 68,402.20 is: 102,603.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,831.60 : 155,747.40 = 68,402.20 : x
  2. Step 2: Convert to fraction form
    103,831.60/155,747.40 = 68,402.20/x
  3. Step 3: Cross multiply
    103,831.60x = 155,747.40 × 68,402.20
  4. Step 4: Simplify right side
    103,831.60x = 10,653,464,804.28
  5. Step 5: Solve for x
    x = 10,653,464,804.28/103,831.60
  6. Step 6: Final answer
    x = 102,603.30

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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.