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Finding the Fourth Proportional to 354,365.69, 531,509.65 and 126,612.72

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Solution

The fourth proportional to 354,365.69, 531,509.65 and 126,612.72 is: 189,905.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,365.69 : 531,509.65 = 126,612.72 : x
  2. Step 2: Convert to fraction form
    354,365.69/531,509.65 = 126,612.72/x
  3. Step 3: Cross multiply
    354,365.69x = 531,509.65 × 126,612.72
  4. Step 4: Simplify right side
    354,365.69x = 67,295,882,176.22
  5. Step 5: Solve for x
    x = 67,295,882,176.22/354,365.69
  6. Step 6: Final answer
    x = 189,905.19

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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.