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Finding the Fourth Proportional to 113,200, 156,221.13 and 62,899

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Solution

The fourth proportional to 113,200, 156,221.13 and 62,899 is: 86,803.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,200 : 156,221.13 = 62,899 : x
  2. Step 2: Convert to fraction form
    113,200/156,221.13 = 62,899/x
  3. Step 3: Cross multiply
    113,200x = 156,221.13 × 62,899
  4. Step 4: Simplify right side
    113,200x = 9,826,152,855.87
  5. Step 5: Solve for x
    x = 9,826,152,855.87/113,200
  6. Step 6: Final answer
    x = 86,803.47

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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.