Home / 28,080,278.40-42,120,417.60-7,886,179.20

Finding the Fourth Proportional to 28,080,278.40, 42,120,417.60 and 7,886,179.20

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Solution

The fourth proportional to 28,080,278.40, 42,120,417.60 and 7,886,179.20 is: 11,829,268.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080,278.40 : 42,120,417.60 = 7,886,179.20 : x
  2. Step 2: Convert to fraction form
    28,080,278.40/42,120,417.60 = 7,886,179.20/x
  3. Step 3: Cross multiply
    28,080,278.40x = 42,120,417.60 × 7,886,179.20
  4. Step 4: Simplify right side
    28,080,278.40x = 332,169,161,172,433.94
  5. Step 5: Solve for x
    x = 332,169,161,172,433.94/28,080,278.40
  6. Step 6: Final answer
    x = 11,829,268.80

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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.