Home / 78,166,820.72-107,869,815.24-43,359,150.80

Finding the Fourth Proportional to 78,166,820.72, 107,869,815.24 and 43,359,150.80

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Solution

The fourth proportional to 78,166,820.72, 107,869,815.24 and 43,359,150.80 is: 59,835,407.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,166,820.72 : 107,869,815.24 = 43,359,150.80 : x
  2. Step 2: Convert to fraction form
    78,166,820.72/107,869,815.24 = 43,359,150.80/x
  3. Step 3: Cross multiply
    78,166,820.72x = 107,869,815.24 × 43,359,150.80
  4. Step 4: Simplify right side
    78,166,820.72x = 4,677,143,585,759,298
  5. Step 5: Solve for x
    x = 4,677,143,585,759,298/78,166,820.72
  6. Step 6: Final answer
    x = 59,835,407.69

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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.