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Finding the Fourth Proportional to 104,127.64, 143,679.90 and 61,679.32

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Solution

The fourth proportional to 104,127.64, 143,679.90 and 61,679.32 is: 85,107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,127.64 : 143,679.90 = 61,679.32 : x
  2. Step 2: Convert to fraction form
    104,127.64/143,679.90 = 61,679.32/x
  3. Step 3: Cross multiply
    104,127.64x = 143,679.90 × 61,679.32
  4. Step 4: Simplify right side
    104,127.64x = 8,862,078,529.67
  5. Step 5: Solve for x
    x = 8,862,078,529.67/104,127.64
  6. Step 6: Final answer
    x = 85,107.84

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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.