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Finding the Fourth Proportional to 72,687,760.60, 109,031,640.90 and 49,729,509.40

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Solution

The fourth proportional to 72,687,760.60, 109,031,640.90 and 49,729,509.40 is: 74,594,264.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,687,760.60 : 109,031,640.90 = 49,729,509.40 : x
  2. Step 2: Convert to fraction form
    72,687,760.60/109,031,640.90 = 49,729,509.40/x
  3. Step 3: Cross multiply
    72,687,760.60x = 109,031,640.90 × 49,729,509.40
  4. Step 4: Simplify right side
    72,687,760.60x = 5,422,090,011,033,975
  5. Step 5: Solve for x
    x = 5,422,090,011,033,975/72,687,760.60
  6. Step 6: Final answer
    x = 74,594,264.10

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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.