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Finding the Fourth Proportional to 81,602.64, 122,325.66 and 28,983.42

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Solution

The fourth proportional to 81,602.64, 122,325.66 and 28,983.42 is: 43,447.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,602.64 : 122,325.66 = 28,983.42 : x
  2. Step 2: Convert to fraction form
    81,602.64/122,325.66 = 28,983.42/x
  3. Step 3: Cross multiply
    81,602.64x = 122,325.66 × 28,983.42
  4. Step 4: Simplify right side
    81,602.64x = 3,545,415,980.56
  5. Step 5: Solve for x
    x = 3,545,415,980.56/81,602.64
  6. Step 6: Final answer
    x = 43,447.32

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1.5x scale

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.