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Finding the Fourth Proportional to 78,067,389.87, 107,733,639.87 and 43,260,661.58

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Solution

The fourth proportional to 78,067,389.87, 107,733,639.87 and 43,260,661.58 is: 59,700,068.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,067,389.87 : 107,733,639.87 = 43,260,661.58 : x
  2. Step 2: Convert to fraction form
    78,067,389.87/107,733,639.87 = 43,260,661.58/x
  3. Step 3: Cross multiply
    78,067,389.87x = 107,733,639.87 × 43,260,661.58
  4. Step 4: Simplify right side
    78,067,389.87x = 4,660,628,534,658,998
  5. Step 5: Solve for x
    x = 4,660,628,534,658,998/78,067,389.87
  6. Step 6: Final answer
    x = 59,700,068.65

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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.