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Finding the Fourth Proportional to 60,509.28, 90,705.60 and 40,743.72

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Solution

The fourth proportional to 60,509.28, 90,705.60 and 40,743.72 is: 61,076.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,509.28 : 90,705.60 = 40,743.72 : x
  2. Step 2: Convert to fraction form
    60,509.28/90,705.60 = 40,743.72/x
  3. Step 3: Cross multiply
    60,509.28x = 90,705.60 × 40,743.72
  4. Step 4: Simplify right side
    60,509.28x = 3,695,683,568.83
  5. Step 5: Solve for x
    x = 3,695,683,568.83/60,509.28
  6. Step 6: Final answer
    x = 61,076.31

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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.