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Finding the Fourth Proportional to 205,802.72, 308,704.08 and 135,665.63

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Solution

The fourth proportional to 205,802.72, 308,704.08 and 135,665.63 is: 203,498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,802.72 : 308,704.08 = 135,665.63 : x
  2. Step 2: Convert to fraction form
    205,802.72/308,704.08 = 135,665.63/x
  3. Step 3: Cross multiply
    205,802.72x = 308,704.08 × 135,665.63
  4. Step 4: Simplify right side
    205,802.72x = 41,880,533,496.77
  5. Step 5: Solve for x
    x = 41,880,533,496.77/205,802.72
  6. Step 6: Final answer
    x = 203,498.45

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1.5x scale

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.