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Finding the Fourth Proportional to 171,720.78, 257,620.40 and 59,400.91

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Solution

The fourth proportional to 171,720.78, 257,620.40 and 59,400.91 is: 89,114.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,720.78 : 257,620.40 = 59,400.91 : x
  2. Step 2: Convert to fraction form
    171,720.78/257,620.40 = 59,400.91/x
  3. Step 3: Cross multiply
    171,720.78x = 257,620.40 × 59,400.91
  4. Step 4: Simplify right side
    171,720.78x = 15,302,886,442.34
  5. Step 5: Solve for x
    x = 15,302,886,442.34/171,720.78
  6. Step 6: Final answer
    x = 89,114.94

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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.