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Finding the Fourth Proportional to 70,241.07, 105,361.71 and 28,688.07

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Solution

The fourth proportional to 70,241.07, 105,361.71 and 28,688.07 is: 43,032.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,241.07 : 105,361.71 = 28,688.07 : x
  2. Step 2: Convert to fraction form
    70,241.07/105,361.71 = 28,688.07/x
  3. Step 3: Cross multiply
    70,241.07x = 105,361.71 × 28,688.07
  4. Step 4: Simplify right side
    70,241.07x = 3,022,624,111.80
  5. Step 5: Solve for x
    x = 3,022,624,111.80/70,241.07
  6. Step 6: Final answer
    x = 43,032.15

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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.