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Finding the Fourth Proportional to 156,640.50, 216,164.08 and 85,020.51

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Solution

The fourth proportional to 156,640.50, 216,164.08 and 85,020.51 is: 117,328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,640.50 : 216,164.08 = 85,020.51 : x
  2. Step 2: Convert to fraction form
    156,640.50/216,164.08 = 85,020.51/x
  3. Step 3: Cross multiply
    156,640.50x = 216,164.08 × 85,020.51
  4. Step 4: Simplify right side
    156,640.50x = 18,378,379,900.18
  5. Step 5: Solve for x
    x = 18,378,379,900.18/156,640.50
  6. Step 6: Final answer
    x = 117,328.41

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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.