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Finding the Fourth Proportional to 73,109.70, 109,664.55 and 42,005.70

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Solution

The fourth proportional to 73,109.70, 109,664.55 and 42,005.70 is: 63,008.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,109.70 : 109,664.55 = 42,005.70 : x
  2. Step 2: Convert to fraction form
    73,109.70/109,664.55 = 42,005.70/x
  3. Step 3: Cross multiply
    73,109.70x = 109,664.55 × 42,005.70
  4. Step 4: Simplify right side
    73,109.70x = 4,606,536,187.94
  5. Step 5: Solve for x
    x = 4,606,536,187.94/73,109.70
  6. Step 6: Final answer
    x = 63,008.55

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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.