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Finding the Fourth Proportional to 103,958.79, 143,463.23 and 56,212.12

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Solution

The fourth proportional to 103,958.79, 143,463.23 and 56,212.12 is: 77,572.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,958.79 : 143,463.23 = 56,212.12 : x
  2. Step 2: Convert to fraction form
    103,958.79/143,463.23 = 56,212.12/x
  3. Step 3: Cross multiply
    103,958.79x = 143,463.23 × 56,212.12
  4. Step 4: Simplify right side
    103,958.79x = 8,064,372,300.35
  5. Step 5: Solve for x
    x = 8,064,372,300.35/103,958.79
  6. Step 6: Final answer
    x = 77,572.78

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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.