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Finding the Fourth Proportional to 52,330.56, 78,495.84 and 21,187.68

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Solution

The fourth proportional to 52,330.56, 78,495.84 and 21,187.68 is: 31,781.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,330.56 : 78,495.84 = 21,187.68 : x
  2. Step 2: Convert to fraction form
    52,330.56/78,495.84 = 21,187.68/x
  3. Step 3: Cross multiply
    52,330.56x = 78,495.84 × 21,187.68
  4. Step 4: Simplify right side
    52,330.56x = 1,663,144,739.25
  5. Step 5: Solve for x
    x = 1,663,144,739.25/52,330.56
  6. Step 6: Final answer
    x = 31,781.52

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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.