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Finding the Fourth Proportional to 113,520.98, 156,640.20 and 68,808.98

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Solution

The fourth proportional to 113,520.98, 156,640.20 and 68,808.98 is: 94,945.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,520.98 : 156,640.20 = 68,808.98 : x
  2. Step 2: Convert to fraction form
    113,520.98/156,640.20 = 68,808.98/x
  3. Step 3: Cross multiply
    113,520.98x = 156,640.20 × 68,808.98
  4. Step 4: Simplify right side
    113,520.98x = 10,778,252,389.00
  5. Step 5: Solve for x
    x = 10,778,252,389.00/113,520.98
  6. Step 6: Final answer
    x = 94,945.03

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1.5x scale

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.