Home / 42,642,076.80-63,921,124.80-21,080,006.40

Finding the Fourth Proportional to 42,642,076.80, 63,921,124.80 and 21,080,006.40

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Solution

The fourth proportional to 42,642,076.80, 63,921,124.80 and 21,080,006.40 is: 31,599,251.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,642,076.80 : 63,921,124.80 = 21,080,006.40 : x
  2. Step 2: Convert to fraction form
    42,642,076.80/63,921,124.80 = 21,080,006.40/x
  3. Step 3: Cross multiply
    42,642,076.80x = 63,921,124.80 × 21,080,006.40
  4. Step 4: Simplify right side
    42,642,076.80x = 1,347,457,719,879,198.50
  5. Step 5: Solve for x
    x = 1,347,457,719,879,198.50/42,642,076.80
  6. Step 6: Final answer
    x = 31,599,251.75

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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.