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Finding the Fourth Proportional to 103,911.52, 143,399.28 and 61,468.96

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Solution

The fourth proportional to 103,911.52, 143,399.28 and 61,468.96 is: 84,827.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,911.52 : 143,399.28 = 61,468.96 : x
  2. Step 2: Convert to fraction form
    103,911.52/143,399.28 = 61,468.96/x
  3. Step 3: Cross multiply
    103,911.52x = 143,399.28 × 61,468.96
  4. Step 4: Simplify right side
    103,911.52x = 8,814,604,606.35
  5. Step 5: Solve for x
    x = 8,814,604,606.35/103,911.52
  6. Step 6: Final answer
    x = 84,827.98

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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.