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Finding the Fourth Proportional to 9,979,957.86, 13,772,351.61 and 5,396,278.02

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Solution

The fourth proportional to 9,979,957.86, 13,772,351.61 and 5,396,278.02 is: 7,446,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,979,957.86 : 13,772,351.61 = 5,396,278.02 : x
  2. Step 2: Convert to fraction form
    9,979,957.86/13,772,351.61 = 5,396,278.02/x
  3. Step 3: Cross multiply
    9,979,957.86x = 13,772,351.61 × 5,396,278.02
  4. Step 4: Simplify right side
    9,979,957.86x = 74,319,438,276,754.61
  5. Step 5: Solve for x
    x = 74,319,438,276,754.61/9,979,957.86
  6. Step 6: Final answer
    x = 7,446,868.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.