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Finding the Fourth Proportional to 73,129.20, 109,693.80 and 49,509.60

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Solution

The fourth proportional to 73,129.20, 109,693.80 and 49,509.60 is: 74,264.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,129.20 : 109,693.80 = 49,509.60 : x
  2. Step 2: Convert to fraction form
    73,129.20/109,693.80 = 49,509.60/x
  3. Step 3: Cross multiply
    73,129.20x = 109,693.80 × 49,509.60
  4. Step 4: Simplify right side
    73,129.20x = 5,430,896,160.48
  5. Step 5: Solve for x
    x = 5,430,896,160.48/73,129.20
  6. Step 6: Final answer
    x = 74,264.40

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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.