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Finding the Fourth Proportional to 103,648.80, 154,664.81 and 92,478.72

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Solution

The fourth proportional to 103,648.80, 154,664.81 and 92,478.72 is: 137,996.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,648.80 : 154,664.81 = 92,478.72 : x
  2. Step 2: Convert to fraction form
    103,648.80/154,664.81 = 92,478.72/x
  3. Step 3: Cross multiply
    103,648.80x = 154,664.81 × 92,478.72
  4. Step 4: Simplify right side
    103,648.80x = 14,303,203,657.84
  5. Step 5: Solve for x
    x = 14,303,203,657.84/103,648.80
  6. Step 6: Final answer
    x = 137,996.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.