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Finding the Fourth Proportional to 171,931.88, 257,562.34 and 112,587.64

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Solution

The fourth proportional to 171,931.88, 257,562.34 and 112,587.64 is: 168,661.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,931.88 : 257,562.34 = 112,587.64 : x
  2. Step 2: Convert to fraction form
    171,931.88/257,562.34 = 112,587.64/x
  3. Step 3: Cross multiply
    171,931.88x = 257,562.34 × 112,587.64
  4. Step 4: Simplify right side
    171,931.88x = 28,998,336,013.48
  5. Step 5: Solve for x
    x = 28,998,336,013.48/171,931.88
  6. Step 6: Final answer
    x = 168,661.77

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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.