Home / 78,500,087.16-117,750,122.94-20,990,863.62

Finding the Fourth Proportional to 78,500,087.16, 117,750,122.94 and 20,990,863.62

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Solution

The fourth proportional to 78,500,087.16, 117,750,122.94 and 20,990,863.62 is: 31,486,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500,087.16 : 117,750,122.94 = 20,990,863.62 : x
  2. Step 2: Convert to fraction form
    78,500,087.16/117,750,122.94 = 20,990,863.62/x
  3. Step 3: Cross multiply
    78,500,087.16x = 117,750,122.94 × 20,990,863.62
  4. Step 4: Simplify right side
    78,500,087.16x = 2,471,676,771,871,773.50
  5. Step 5: Solve for x
    x = 2,471,676,771,871,773.50/78,500,087.16
  6. Step 6: Final answer
    x = 31,486,293.34

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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.