Home / 78,009,859.80-117,014,789.70-39,746,107.80

Finding the Fourth Proportional to 78,009,859.80, 117,014,789.70 and 39,746,107.80

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Solution

The fourth proportional to 78,009,859.80, 117,014,789.70 and 39,746,107.80 is: 59,619,161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,009,859.80 : 117,014,789.70 = 39,746,107.80 : x
  2. Step 2: Convert to fraction form
    78,009,859.80/117,014,789.70 = 39,746,107.80/x
  3. Step 3: Cross multiply
    78,009,859.80x = 117,014,789.70 × 39,746,107.80
  4. Step 4: Simplify right side
    78,009,859.80x = 4,650,882,445,610,529
  5. Step 5: Solve for x
    x = 4,650,882,445,610,529/78,009,859.80
  6. Step 6: Final answer
    x = 59,619,161.70

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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.