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Finding the Fourth Proportional to 70,355.90, 105,544.64 and 28,235.90

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Solution

The fourth proportional to 70,355.90, 105,544.64 and 28,235.90 is: 42,358.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,355.90 : 105,544.64 = 28,235.90 : x
  2. Step 2: Convert to fraction form
    70,355.90/105,544.64 = 28,235.90/x
  3. Step 3: Cross multiply
    70,355.90x = 105,544.64 × 28,235.90
  4. Step 4: Simplify right side
    70,355.90x = 2,980,147,443.44
  5. Step 5: Solve for x
    x = 2,980,147,443.44/70,355.90
  6. Step 6: Final answer
    x = 42,358.18

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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.