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Finding the Fourth Proportional to 104,165.78, 143,748.99 and 56,419.13

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Solution

The fourth proportional to 104,165.78, 143,748.99 and 56,419.13 is: 77,858.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,165.78 : 143,748.99 = 56,419.13 : x
  2. Step 2: Convert to fraction form
    104,165.78/143,748.99 = 56,419.13/x
  3. Step 3: Cross multiply
    104,165.78x = 143,748.99 × 56,419.13
  4. Step 4: Simplify right side
    104,165.78x = 8,110,192,235.43
  5. Step 5: Solve for x
    x = 8,110,192,235.43/104,165.78
  6. Step 6: Final answer
    x = 77,858.51

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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.