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Finding the Fourth Proportional to 81,462.60, 122,193.90 and 56,579.40

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Solution

The fourth proportional to 81,462.60, 122,193.90 and 56,579.40 is: 84,869.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,462.60 : 122,193.90 = 56,579.40 : x
  2. Step 2: Convert to fraction form
    81,462.60/122,193.90 = 56,579.40/x
  3. Step 3: Cross multiply
    81,462.60x = 122,193.90 × 56,579.40
  4. Step 4: Simplify right side
    81,462.60x = 6,913,657,545.66
  5. Step 5: Solve for x
    x = 6,913,657,545.66/81,462.60
  6. Step 6: Final answer
    x = 84,869.10

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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.