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Finding the Fourth Proportional to 70,293.36, 105,440.08 and 28,740.36

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Solution

The fourth proportional to 70,293.36, 105,440.08 and 28,740.36 is: 43,110.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,293.36 : 105,440.08 = 28,740.36 : x
  2. Step 2: Convert to fraction form
    70,293.36/105,440.08 = 28,740.36/x
  3. Step 3: Cross multiply
    70,293.36x = 105,440.08 × 28,740.36
  4. Step 4: Simplify right side
    70,293.36x = 3,030,385,857.63
  5. Step 5: Solve for x
    x = 3,030,385,857.63/70,293.36
  6. Step 6: Final answer
    x = 43,110.56

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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.