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Finding the Fourth Proportional to 109,940.70, 151,715.37 and 61,543.20

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Solution

The fourth proportional to 109,940.70, 151,715.37 and 61,543.20 is: 84,928.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,940.70 : 151,715.37 = 61,543.20 : x
  2. Step 2: Convert to fraction form
    109,940.70/151,715.37 = 61,543.20/x
  3. Step 3: Cross multiply
    109,940.70x = 151,715.37 × 61,543.20
  4. Step 4: Simplify right side
    109,940.70x = 9,337,049,358.98
  5. Step 5: Solve for x
    x = 9,337,049,358.98/109,940.70
  6. Step 6: Final answer
    x = 84,928.05

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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.