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Finding the Fourth Proportional to 171,453.40, 257,471.70 and 127,130.20

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Solution

The fourth proportional to 171,453.40, 257,471.70 and 127,130.20 is: 190,911.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,453.40 : 257,471.70 = 127,130.20 : x
  2. Step 2: Convert to fraction form
    171,453.40/257,471.70 = 127,130.20/x
  3. Step 3: Cross multiply
    171,453.40x = 257,471.70 × 127,130.20
  4. Step 4: Simplify right side
    171,453.40x = 32,732,428,715.34
  5. Step 5: Solve for x
    x = 32,732,428,715.34/171,453.40
  6. Step 6: Final answer
    x = 190,911.52

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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.