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Finding the Fourth Proportional to 69,986,979.60, 104,980,469.40 and 61,672,880.40

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Solution

The fourth proportional to 69,986,979.60, 104,980,469.40 and 61,672,880.40 is: 92,509,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,986,979.60 : 104,980,469.40 = 61,672,880.40 : x
  2. Step 2: Convert to fraction form
    69,986,979.60/104,980,469.40 = 61,672,880.40/x
  3. Step 3: Cross multiply
    69,986,979.60x = 104,980,469.40 × 61,672,880.40
  4. Step 4: Simplify right side
    69,986,979.60x = 6,474,447,933,642,060
  5. Step 5: Solve for x
    x = 6,474,447,933,642,060/69,986,979.60
  6. Step 6: Final answer
    x = 92,509,320.60

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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.