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Finding the Fourth Proportional to 171,662.40, 257,785.20 and 127,339.20

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Solution

The fourth proportional to 171,662.40, 257,785.20 and 127,339.20 is: 191,225.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,662.40 : 257,785.20 = 127,339.20 : x
  2. Step 2: Convert to fraction form
    171,662.40/257,785.20 = 127,339.20/x
  3. Step 3: Cross multiply
    171,662.40x = 257,785.20 × 127,339.20
  4. Step 4: Simplify right side
    171,662.40x = 32,826,161,139.84
  5. Step 5: Solve for x
    x = 32,826,161,139.84/171,662.40
  6. Step 6: Final answer
    x = 191,225.11

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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.