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Finding the Fourth Proportional to 171,640.70, 257,461.05 and 145,720.70

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Solution

The fourth proportional to 171,640.70, 257,461.05 and 145,720.70 is: 218,581.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,640.70 : 257,461.05 = 145,720.70 : x
  2. Step 2: Convert to fraction form
    171,640.70/257,461.05 = 145,720.70/x
  3. Step 3: Cross multiply
    171,640.70x = 257,461.05 × 145,720.70
  4. Step 4: Simplify right side
    171,640.70x = 37,517,404,428.74
  5. Step 5: Solve for x
    x = 37,517,404,428.74/171,640.70
  6. Step 6: Final answer
    x = 218,581.05

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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.