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Finding the Fourth Proportional to 171,620.40, 257,430.60 and 53,303.70

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Solution

The fourth proportional to 171,620.40, 257,430.60 and 53,303.70 is: 79,955.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,620.40 : 257,430.60 = 53,303.70 : x
  2. Step 2: Convert to fraction form
    171,620.40/257,430.60 = 53,303.70/x
  3. Step 3: Cross multiply
    171,620.40x = 257,430.60 × 53,303.70
  4. Step 4: Simplify right side
    171,620.40x = 13,722,003,473.22
  5. Step 5: Solve for x
    x = 13,722,003,473.22/171,620.40
  6. Step 6: Final answer
    x = 79,955.55

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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.