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Finding the Fourth Proportional to 68,286,061.80, 102,429,092.70 and 61,111,608.30

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Solution

The fourth proportional to 68,286,061.80, 102,429,092.70 and 61,111,608.30 is: 91,667,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,286,061.80 : 102,429,092.70 = 61,111,608.30 : x
  2. Step 2: Convert to fraction form
    68,286,061.80/102,429,092.70 = 61,111,608.30/x
  3. Step 3: Cross multiply
    68,286,061.80x = 102,429,092.70 × 61,111,608.30
  4. Step 4: Simplify right side
    68,286,061.80x = 6,259,606,591,606,789
  5. Step 5: Solve for x
    x = 6,259,606,591,606,789/68,286,061.80
  6. Step 6: Final answer
    x = 91,667,412.45

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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.