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Finding the Fourth Proportional to 103,620.99, 143,002.23 and 61,178.61

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Solution

The fourth proportional to 103,620.99, 143,002.23 and 61,178.61 is: 84,429.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.99 : 143,002.23 = 61,178.61 : x
  2. Step 2: Convert to fraction form
    103,620.99/143,002.23 = 61,178.61/x
  3. Step 3: Cross multiply
    103,620.99x = 143,002.23 × 61,178.61
  4. Step 4: Simplify right side
    103,620.99x = 8,748,677,658.30
  5. Step 5: Solve for x
    x = 8,748,677,658.30/103,620.99
  6. Step 6: Final answer
    x = 84,429.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.