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Finding the Fourth Proportional to 171,810.72, 257,628.60 and 66,659.76

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Solution

The fourth proportional to 171,810.72, 257,628.60 and 66,659.76 is: 99,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,810.72 : 257,628.60 = 66,659.76 : x
  2. Step 2: Convert to fraction form
    171,810.72/257,628.60 = 66,659.76/x
  3. Step 3: Cross multiply
    171,810.72x = 257,628.60 × 66,659.76
  4. Step 4: Simplify right side
    171,810.72x = 17,173,460,645.14
  5. Step 5: Solve for x
    x = 17,173,460,645.14/171,810.72
  6. Step 6: Final answer
    x = 99,955.70

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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.