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Finding the Fourth Proportional to 81,795.62, 112,807.98 and 56,342.58

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Solution

The fourth proportional to 81,795.62, 112,807.98 and 56,342.58 is: 77,704.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,795.62 : 112,807.98 = 56,342.58 : x
  2. Step 2: Convert to fraction form
    81,795.62/112,807.98 = 56,342.58/x
  3. Step 3: Cross multiply
    81,795.62x = 112,807.98 × 56,342.58
  4. Step 4: Simplify right side
    81,795.62x = 6,355,892,637.79
  5. Step 5: Solve for x
    x = 6,355,892,637.79/81,795.62
  6. Step 6: Final answer
    x = 77,704.56

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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.