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Finding the Fourth Proportional to 207,145.83, 285,900.51 and 129,657.42

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Solution

The fourth proportional to 207,145.83, 285,900.51 and 129,657.42 is: 178,951.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,145.83 : 285,900.51 = 129,657.42 : x
  2. Step 2: Convert to fraction form
    207,145.83/285,900.51 = 129,657.42/x
  3. Step 3: Cross multiply
    207,145.83x = 285,900.51 × 129,657.42
  4. Step 4: Simplify right side
    207,145.83x = 37,069,122,503.28
  5. Step 5: Solve for x
    x = 37,069,122,503.28/207,145.83
  6. Step 6: Final answer
    x = 178,951.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.