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Finding the Fourth Proportional to 70,186.88, 105,271.68 and 30,736.64

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Solution

The fourth proportional to 70,186.88, 105,271.68 and 30,736.64 is: 46,101.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,186.88 : 105,271.68 = 30,736.64 : x
  2. Step 2: Convert to fraction form
    70,186.88/105,271.68 = 30,736.64/x
  3. Step 3: Cross multiply
    70,186.88x = 105,271.68 × 30,736.64
  4. Step 4: Simplify right side
    70,186.88x = 3,235,697,730.36
  5. Step 5: Solve for x
    x = 3,235,697,730.36/70,186.88
  6. Step 6: Final answer
    x = 46,101.18

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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.