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Finding the Fourth Proportional to 131,479.70, 197,111.55 and 56,657.30

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Solution

The fourth proportional to 131,479.70, 197,111.55 and 56,657.30 is: 84,939.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,479.70 : 197,111.55 = 56,657.30 : x
  2. Step 2: Convert to fraction form
    131,479.70/197,111.55 = 56,657.30/x
  3. Step 3: Cross multiply
    131,479.70x = 197,111.55 × 56,657.30
  4. Step 4: Simplify right side
    131,479.70x = 11,167,808,221.82
  5. Step 5: Solve for x
    x = 11,167,808,221.82/131,479.70
  6. Step 6: Final answer
    x = 84,939.41

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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.