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Finding the Fourth Proportional to 103,318.16, 154,979.12 and 28,437.88

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Solution

The fourth proportional to 103,318.16, 154,979.12 and 28,437.88 is: 42,657.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,318.16 : 154,979.12 = 28,437.88 : x
  2. Step 2: Convert to fraction form
    103,318.16/154,979.12 = 28,437.88/x
  3. Step 3: Cross multiply
    103,318.16x = 154,979.12 × 28,437.88
  4. Step 4: Simplify right side
    103,318.16x = 4,407,277,617.07
  5. Step 5: Solve for x
    x = 4,407,277,617.07/103,318.16
  6. Step 6: Final answer
    x = 42,657.34

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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.