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Finding the Fourth Proportional to 70,354.36, 105,555.93 and 30,905.98

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Solution

The fourth proportional to 70,354.36, 105,555.93 and 30,905.98 is: 46,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,354.36 : 105,555.93 = 30,905.98 : x
  2. Step 2: Convert to fraction form
    70,354.36/105,555.93 = 30,905.98/x
  3. Step 3: Cross multiply
    70,354.36x = 105,555.93 × 30,905.98
  4. Step 4: Simplify right side
    70,354.36x = 3,262,309,461.46
  5. Step 5: Solve for x
    x = 3,262,309,461.46/70,354.36
  6. Step 6: Final answer
    x = 46,369.68

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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.