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Finding the Fourth Proportional to 104,145.15, 143,720.03 and 56,398.49

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Solution

The fourth proportional to 104,145.15, 143,720.03 and 56,398.49 is: 77,829.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,145.15 : 143,720.03 = 56,398.49 : x
  2. Step 2: Convert to fraction form
    104,145.15/143,720.03 = 56,398.49/x
  3. Step 3: Cross multiply
    104,145.15x = 143,720.03 × 56,398.49
  4. Step 4: Simplify right side
    104,145.15x = 8,105,592,318.86
  5. Step 5: Solve for x
    x = 8,105,592,318.86/104,145.15
  6. Step 6: Final answer
    x = 77,829.76

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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.