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Finding the Fourth Proportional to 61,218.63, 91,703.30 and 56,115.63

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Solution

The fourth proportional to 61,218.63, 91,703.30 and 56,115.63 is: 84,059.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,218.63 : 91,703.30 = 56,115.63 : x
  2. Step 2: Convert to fraction form
    61,218.63/91,703.30 = 56,115.63/x
  3. Step 3: Cross multiply
    61,218.63x = 91,703.30 × 56,115.63
  4. Step 4: Simplify right side
    61,218.63x = 5,145,988,172.00
  5. Step 5: Solve for x
    x = 5,145,988,172.00/61,218.63
  6. Step 6: Final answer
    x = 84,059.19

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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.