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Finding the Fourth Proportional to 72,643.72, 100,176.42 and 44,332.60

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Solution

The fourth proportional to 72,643.72, 100,176.42 and 44,332.60 is: 61,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.72 : 100,176.42 = 44,332.60 : x
  2. Step 2: Convert to fraction form
    72,643.72/100,176.42 = 44,332.60/x
  3. Step 3: Cross multiply
    72,643.72x = 100,176.42 × 44,332.60
  4. Step 4: Simplify right side
    72,643.72x = 4,441,081,157.29
  5. Step 5: Solve for x
    x = 4,441,081,157.29/72,643.72
  6. Step 6: Final answer
    x = 61,135.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.