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Finding the Fourth Proportional to 52,699.78, 79,049.67 and 21,535

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Solution

The fourth proportional to 52,699.78, 79,049.67 and 21,535 is: 32,302.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,699.78 : 79,049.67 = 21,535 : x
  2. Step 2: Convert to fraction form
    52,699.78/79,049.67 = 21,535/x
  3. Step 3: Cross multiply
    52,699.78x = 79,049.67 × 21,535
  4. Step 4: Simplify right side
    52,699.78x = 1,702,334,643.45
  5. Step 5: Solve for x
    x = 1,702,334,643.45/52,699.78
  6. Step 6: Final answer
    x = 32,302.50

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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.