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Finding the Fourth Proportional to 78,997.77, 108,465.65 and 76,941.99

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Solution

The fourth proportional to 78,997.77, 108,465.65 and 76,941.99 is: 105,643.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,997.77 : 108,465.65 = 76,941.99 : x
  2. Step 2: Convert to fraction form
    78,997.77/108,465.65 = 76,941.99/x
  3. Step 3: Cross multiply
    78,997.77x = 108,465.65 × 76,941.99
  4. Step 4: Simplify right side
    78,997.77x = 8,345,562,572.93
  5. Step 5: Solve for x
    x = 8,345,562,572.93/78,997.77
  6. Step 6: Final answer
    x = 105,643.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.