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Finding the Fourth Proportional to 445,449.94, 668,273.19 and 129,931.54

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Solution

The fourth proportional to 445,449.94, 668,273.19 and 129,931.54 is: 194,925.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,449.94 : 668,273.19 = 129,931.54 : x
  2. Step 2: Convert to fraction form
    445,449.94/668,273.19 = 129,931.54/x
  3. Step 3: Cross multiply
    445,449.94x = 668,273.19 × 129,931.54
  4. Step 4: Simplify right side
    445,449.94x = 86,829,764,717.41
  5. Step 5: Solve for x
    x = 86,829,764,717.41/445,449.94
  6. Step 6: Final answer
    x = 194,925.98

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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.