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Finding the Fourth Proportional to 171,602.90, 257,404.35 and 145,423.70

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Solution

The fourth proportional to 171,602.90, 257,404.35 and 145,423.70 is: 218,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,602.90 : 257,404.35 = 145,423.70 : x
  2. Step 2: Convert to fraction form
    171,602.90/257,404.35 = 145,423.70/x
  3. Step 3: Cross multiply
    171,602.90x = 257,404.35 × 145,423.70
  4. Step 4: Simplify right side
    171,602.90x = 37,432,692,973.10
  5. Step 5: Solve for x
    x = 37,432,692,973.10/171,602.90
  6. Step 6: Final answer
    x = 218,135.55

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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.