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Finding the Fourth Proportional to 103,307.81, 154,961.61 and 28,428.37

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Solution

The fourth proportional to 103,307.81, 154,961.61 and 28,428.37 is: 42,642.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,307.81 : 154,961.61 = 28,428.37 : x
  2. Step 2: Convert to fraction form
    103,307.81/154,961.61 = 28,428.37/x
  3. Step 3: Cross multiply
    103,307.81x = 154,961.61 × 28,428.37
  4. Step 4: Simplify right side
    103,307.81x = 4,405,305,490.87
  5. Step 5: Solve for x
    x = 4,405,305,490.87/103,307.81
  6. Step 6: Final answer
    x = 42,642.52

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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.