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Finding the Fourth Proportional to 207,221.58, 285,812.45 and 142,711.46

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Solution

The fourth proportional to 207,221.58, 285,812.45 and 142,711.46 is: 196,836.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,221.58 : 285,812.45 = 142,711.46 : x
  2. Step 2: Convert to fraction form
    207,221.58/285,812.45 = 142,711.46/x
  3. Step 3: Cross multiply
    207,221.58x = 285,812.45 × 142,711.46
  4. Step 4: Simplify right side
    207,221.58x = 40,788,709,883.06
  5. Step 5: Solve for x
    x = 40,788,709,883.06/207,221.58
  6. Step 6: Final answer
    x = 196,836.21

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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.