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Finding the Fourth Proportional to 72,578,405.70, 108,718,309.35 and 36,696,831.30

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Solution

The fourth proportional to 72,578,405.70, 108,718,309.35 and 36,696,831.30 is: 54,969,758.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,405.70 : 108,718,309.35 = 36,696,831.30 : x
  2. Step 2: Convert to fraction form
    72,578,405.70/108,718,309.35 = 36,696,831.30/x
  3. Step 3: Cross multiply
    72,578,405.70x = 108,718,309.35 × 36,696,831.30
  4. Step 4: Simplify right side
    72,578,405.70x = 3,989,617,457,438,162
  5. Step 5: Solve for x
    x = 3,989,617,457,438,162/72,578,405.70
  6. Step 6: Final answer
    x = 54,969,758.83

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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.