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Finding the Fourth Proportional to 101,381.22, 139,904.62 and 56,058.20

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Solution

The fourth proportional to 101,381.22, 139,904.62 and 56,058.20 is: 77,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,381.22 : 139,904.62 = 56,058.20 : x
  2. Step 2: Convert to fraction form
    101,381.22/139,904.62 = 56,058.20/x
  3. Step 3: Cross multiply
    101,381.22x = 139,904.62 × 56,058.20
  4. Step 4: Simplify right side
    101,381.22x = 7,842,801,956.15
  5. Step 5: Solve for x
    x = 7,842,801,956.15/101,381.22
  6. Step 6: Final answer
    x = 77,359.51

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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.