Home / 78,298,700.80-117,448,051.20-20,790,860.80

Finding the Fourth Proportional to 78,298,700.80, 117,448,051.20 and 20,790,860.80

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Solution

The fourth proportional to 78,298,700.80, 117,448,051.20 and 20,790,860.80 is: 31,186,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,298,700.80 : 117,448,051.20 = 20,790,860.80 : x
  2. Step 2: Convert to fraction form
    78,298,700.80/117,448,051.20 = 20,790,860.80/x
  3. Step 3: Cross multiply
    78,298,700.80x = 117,448,051.20 × 20,790,860.80
  4. Step 4: Simplify right side
    78,298,700.80x = 2,441,846,083,730,473
  5. Step 5: Solve for x
    x = 2,441,846,083,730,473/78,298,700.80
  6. Step 6: Final answer
    x = 31,186,291.20

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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.