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Finding the Fourth Proportional to 56,753.48, 85,129.79 and 21,223.76

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Solution

The fourth proportional to 56,753.48, 85,129.79 and 21,223.76 is: 31,835.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,753.48 : 85,129.79 = 21,223.76 : x
  2. Step 2: Convert to fraction form
    56,753.48/85,129.79 = 21,223.76/x
  3. Step 3: Cross multiply
    56,753.48x = 85,129.79 × 21,223.76
  4. Step 4: Simplify right side
    56,753.48x = 1,806,773,700.04
  5. Step 5: Solve for x
    x = 1,806,773,700.04/56,753.48
  6. Step 6: Final answer
    x = 31,835.47

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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.