Home / 78,500,090.16-117,750,127.44-20,990,866.62

Finding the Fourth Proportional to 78,500,090.16, 117,750,127.44 and 20,990,866.62

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Solution

The fourth proportional to 78,500,090.16, 117,750,127.44 and 20,990,866.62 is: 31,486,297.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,500,090.16 : 117,750,127.44 = 20,990,866.62 : x
  2. Step 2: Convert to fraction form
    78,500,090.16/117,750,127.44 = 20,990,866.62/x
  3. Step 3: Cross multiply
    78,500,090.16x = 117,750,127.44 × 20,990,866.62
  4. Step 4: Simplify right side
    78,500,090.16x = 2,471,677,219,581,042
  5. Step 5: Solve for x
    x = 2,471,677,219,581,042/78,500,090.16
  6. Step 6: Final answer
    x = 31,486,297.84

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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.