Home / 81,971.10-122,956.65-56,601.90

Finding the Fourth Proportional to 81,971.10, 122,956.65 and 56,601.90

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Solution

The fourth proportional to 81,971.10, 122,956.65 and 56,601.90 is: 84,902.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,971.10 : 122,956.65 = 56,601.90 : x
  2. Step 2: Convert to fraction form
    81,971.10/122,956.65 = 56,601.90/x
  3. Step 3: Cross multiply
    81,971.10x = 122,956.65 × 56,601.90
  4. Step 4: Simplify right side
    81,971.10x = 6,959,580,007.64
  5. Step 5: Solve for x
    x = 6,959,580,007.64/81,971.10
  6. Step 6: Final answer
    x = 84,902.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.