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Finding the Fourth Proportional to 72,788.72, 109,129.08 and 22,840.40

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Solution

The fourth proportional to 72,788.72, 109,129.08 and 22,840.40 is: 34,243.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,788.72 : 109,129.08 = 22,840.40 : x
  2. Step 2: Convert to fraction form
    72,788.72/109,129.08 = 22,840.40/x
  3. Step 3: Cross multiply
    72,788.72x = 109,129.08 × 22,840.40
  4. Step 4: Simplify right side
    72,788.72x = 2,492,551,838.83
  5. Step 5: Solve for x
    x = 2,492,551,838.83/72,788.72
  6. Step 6: Final answer
    x = 34,243.66

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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.