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Finding the Fourth Proportional to 74,753.95, 112,115.63 and 21,431.64

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Solution

The fourth proportional to 74,753.95, 112,115.63 and 21,431.64 is: 32,143.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,753.95 : 112,115.63 = 21,431.64 : x
  2. Step 2: Convert to fraction form
    74,753.95/112,115.63 = 21,431.64/x
  3. Step 3: Cross multiply
    74,753.95x = 112,115.63 × 21,431.64
  4. Step 4: Simplify right side
    74,753.95x = 2,402,821,820.53
  5. Step 5: Solve for x
    x = 2,402,821,820.53/74,753.95
  6. Step 6: Final answer
    x = 32,143.07

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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.