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Finding the Fourth Proportional to 70,288.31, 105,432.57 and 28,735.31

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Solution

The fourth proportional to 70,288.31, 105,432.57 and 28,735.31 is: 43,103.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,288.31 : 105,432.57 = 28,735.31 : x
  2. Step 2: Convert to fraction form
    70,288.31/105,432.57 = 28,735.31/x
  3. Step 3: Cross multiply
    70,288.31x = 105,432.57 × 28,735.31
  4. Step 4: Simplify right side
    70,288.31x = 3,029,637,846.63
  5. Step 5: Solve for x
    x = 3,029,637,846.63/70,288.31
  6. Step 6: Final answer
    x = 43,103.01

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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.