Home / 81,391,831.20-122,087,746.80-30,263,270.40

Finding the Fourth Proportional to 81,391,831.20, 122,087,746.80 and 30,263,270.40

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Solution

The fourth proportional to 81,391,831.20, 122,087,746.80 and 30,263,270.40 is: 45,394,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,391,831.20 : 122,087,746.80 = 30,263,270.40 : x
  2. Step 2: Convert to fraction form
    81,391,831.20/122,087,746.80 = 30,263,270.40/x
  3. Step 3: Cross multiply
    81,391,831.20x = 122,087,746.80 × 30,263,270.40
  4. Step 4: Simplify right side
    81,391,831.20x = 3,694,774,493,935,134.50
  5. Step 5: Solve for x
    x = 3,694,774,493,935,134.50/81,391,831.20
  6. Step 6: Final answer
    x = 45,394,905.60

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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.