Home / 78,500,090.66-117,750,128.19-20,990,867.12

Finding the Fourth Proportional to 78,500,090.66, 117,750,128.19 and 20,990,867.12

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Solution

The fourth proportional to 78,500,090.66, 117,750,128.19 and 20,990,867.12 is: 31,486,298.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500,090.66 : 117,750,128.19 = 20,990,867.12 : x
  2. Step 2: Convert to fraction form
    78,500,090.66/117,750,128.19 = 20,990,867.12/x
  3. Step 3: Cross multiply
    78,500,090.66x = 117,750,128.19 × 20,990,867.12
  4. Step 4: Simplify right side
    78,500,090.66x = 2,471,677,294,199,256
  5. Step 5: Solve for x
    x = 2,471,677,294,199,256/78,500,090.66
  6. Step 6: Final answer
    x = 31,486,298.59

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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.