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Finding the Fourth Proportional to 103,963.40, 143,469.39 and 56,216.63

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Solution

The fourth proportional to 103,963.40, 143,469.39 and 56,216.63 is: 77,578.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,963.40 : 143,469.39 = 56,216.63 : x
  2. Step 2: Convert to fraction form
    103,963.40/143,469.39 = 56,216.63/x
  3. Step 3: Cross multiply
    103,963.40x = 143,469.39 × 56,216.63
  4. Step 4: Simplify right side
    103,963.40x = 8,065,365,613.96
  5. Step 5: Solve for x
    x = 8,065,365,613.96/103,963.40
  6. Step 6: Final answer
    x = 77,578.89

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1.5x scale

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.