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Finding the Fourth Proportional to 70,495.28, 105,735.24 and 28,942.40

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Solution

The fourth proportional to 70,495.28, 105,735.24 and 28,942.40 is: 43,410.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,495.28 : 105,735.24 = 28,942.40 : x
  2. Step 2: Convert to fraction form
    70,495.28/105,735.24 = 28,942.40/x
  3. Step 3: Cross multiply
    70,495.28x = 105,735.24 × 28,942.40
  4. Step 4: Simplify right side
    70,495.28x = 3,060,231,610.18
  5. Step 5: Solve for x
    x = 3,060,231,610.18/70,495.28
  6. Step 6: Final answer
    x = 43,410.45

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1.5x scale

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.