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Finding the Fourth Proportional to 6,499,583.12, 8,978,767.48 and 5,191,117.25

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Solution

The fourth proportional to 6,499,583.12, 8,978,767.48 and 5,191,117.25 is: 7,171,203.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,499,583.12 : 8,978,767.48 = 5,191,117.25 : x
  2. Step 2: Convert to fraction form
    6,499,583.12/8,978,767.48 = 5,191,117.25/x
  3. Step 3: Cross multiply
    6,499,583.12x = 8,978,767.48 × 5,191,117.25
  4. Step 4: Simplify right side
    6,499,583.12x = 46,609,834,749,167.03
  5. Step 5: Solve for x
    x = 46,609,834,749,167.03/6,499,583.12
  6. Step 6: Final answer
    x = 7,171,203.74

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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.