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Finding the Fourth Proportional to 65,736,685.76, 90,716,557.76 and 36,763,309.76

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Solution

The fourth proportional to 65,736,685.76, 90,716,557.76 and 36,763,309.76 is: 50,733,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,736,685.76 : 90,716,557.76 = 36,763,309.76 : x
  2. Step 2: Convert to fraction form
    65,736,685.76/90,716,557.76 = 36,763,309.76/x
  3. Step 3: Cross multiply
    65,736,685.76x = 90,716,557.76 × 36,763,309.76
  4. Step 4: Simplify right side
    65,736,685.76x = 3,335,040,913,291,811.50
  5. Step 5: Solve for x
    x = 3,335,040,913,291,811.50/65,736,685.76
  6. Step 6: Final answer
    x = 50,733,329.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.