Home / 2,101,920.47-3,145,729.65-1,291,877.78

Finding the Fourth Proportional to 2,101,920.47, 3,145,729.65 and 1,291,877.78

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Solution

The fourth proportional to 2,101,920.47, 3,145,729.65 and 1,291,877.78 is: 1,933,421.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101,920.47 : 3,145,729.65 = 1,291,877.78 : x
  2. Step 2: Convert to fraction form
    2,101,920.47/3,145,729.65 = 1,291,877.78/x
  3. Step 3: Cross multiply
    2,101,920.47x = 3,145,729.65 × 1,291,877.78
  4. Step 4: Simplify right side
    2,101,920.47x = 4,063,898,220,993.53
  5. Step 5: Solve for x
    x = 4,063,898,220,993.53/2,101,920.47
  6. Step 6: Final answer
    x = 1,933,421.50

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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.