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Finding the Fourth Proportional to 131,106,641.64, 196,717,978.08 and 68,843,309.64

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Solution

The fourth proportional to 131,106,641.64, 196,717,978.08 and 68,843,309.64 is: 103,295,428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,106,641.64 : 196,717,978.08 = 68,843,309.64 : x
  2. Step 2: Convert to fraction form
    131,106,641.64/196,717,978.08 = 68,843,309.64/x
  3. Step 3: Cross multiply
    131,106,641.64x = 196,717,978.08 × 68,843,309.64
  4. Step 4: Simplify right side
    131,106,641.64x = 13,542,716,676,716,174
  5. Step 5: Solve for x
    x = 13,542,716,676,716,174/131,106,641.64
  6. Step 6: Final answer
    x = 103,295,428.11

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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.