Home / 78,665,419.20-118,014,717.60-33,203,812.80

Finding the Fourth Proportional to 78,665,419.20, 118,014,717.60 and 33,203,812.80

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Solution

The fourth proportional to 78,665,419.20, 118,014,717.60 and 33,203,812.80 is: 49,812,721.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,665,419.20 : 118,014,717.60 = 33,203,812.80 : x
  2. Step 2: Convert to fraction form
    78,665,419.20/118,014,717.60 = 33,203,812.80/x
  3. Step 3: Cross multiply
    78,665,419.20x = 118,014,717.60 × 33,203,812.80
  4. Step 4: Simplify right side
    78,665,419.20x = 3,918,538,590,835,265
  5. Step 5: Solve for x
    x = 3,918,538,590,835,265/78,665,419.20
  6. Step 6: Final answer
    x = 49,812,721.15

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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.