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Finding the Fourth Proportional to 103,141.66, 154,712.58 and 28,262.40

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Solution

The fourth proportional to 103,141.66, 154,712.58 and 28,262.40 is: 42,393.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,141.66 : 154,712.58 = 28,262.40 : x
  2. Step 2: Convert to fraction form
    103,141.66/154,712.58 = 28,262.40/x
  3. Step 3: Cross multiply
    103,141.66x = 154,712.58 × 28,262.40
  4. Step 4: Simplify right side
    103,141.66x = 4,372,548,820.99
  5. Step 5: Solve for x
    x = 4,372,548,820.99/103,141.66
  6. Step 6: Final answer
    x = 42,393.62

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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.