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Finding the Fourth Proportional to 79,157.12, 109,235.32 and 43,345.40

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Solution

The fourth proportional to 79,157.12, 109,235.32 and 43,345.40 is: 59,815.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,157.12 : 109,235.32 = 43,345.40 : x
  2. Step 2: Convert to fraction form
    79,157.12/109,235.32 = 43,345.40/x
  3. Step 3: Cross multiply
    79,157.12x = 109,235.32 × 43,345.40
  4. Step 4: Simplify right side
    79,157.12x = 4,734,848,639.53
  5. Step 5: Solve for x
    x = 4,734,848,639.53/79,157.12
  6. Step 6: Final answer
    x = 59,815.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.