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Finding the Fourth Proportional to 102,640.70, 153,939.45 and 43,478.30

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Solution

The fourth proportional to 102,640.70, 153,939.45 and 43,478.30 is: 65,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,640.70 : 153,939.45 = 43,478.30 : x
  2. Step 2: Convert to fraction form
    102,640.70/153,939.45 = 43,478.30/x
  3. Step 3: Cross multiply
    102,640.70x = 153,939.45 × 43,478.30
  4. Step 4: Simplify right side
    102,640.70x = 6,693,025,588.94
  5. Step 5: Solve for x
    x = 6,693,025,588.94/102,640.70
  6. Step 6: Final answer
    x = 65,208.30

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1.5x scale

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.