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Finding the Fourth Proportional to 56,311.48, 84,486.54 and 21,261.16

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Solution

The fourth proportional to 56,311.48, 84,486.54 and 21,261.16 is: 31,899.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,311.48 : 84,486.54 = 21,261.16 : x
  2. Step 2: Convert to fraction form
    56,311.48/84,486.54 = 21,261.16/x
  3. Step 3: Cross multiply
    56,311.48x = 84,486.54 × 21,261.16
  4. Step 4: Simplify right side
    56,311.48x = 1,796,281,844.79
  5. Step 5: Solve for x
    x = 1,796,281,844.79/56,311.48
  6. Step 6: Final answer
    x = 31,899.03

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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.