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Finding the Fourth Proportional to 219,079.67, 328,619.57 and 61,331.36

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Solution

The fourth proportional to 219,079.67, 328,619.57 and 61,331.36 is: 91,997.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,079.67 : 328,619.57 = 61,331.36 : x
  2. Step 2: Convert to fraction form
    219,079.67/328,619.57 = 61,331.36/x
  3. Step 3: Cross multiply
    219,079.67x = 328,619.57 × 61,331.36
  4. Step 4: Simplify right side
    219,079.67x = 20,154,683,200.96
  5. Step 5: Solve for x
    x = 20,154,683,200.96/219,079.67
  6. Step 6: Final answer
    x = 91,997.05

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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.