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Finding the Fourth Proportional to 70,354.02, 105,541.43 and 20,427.65

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Solution

The fourth proportional to 70,354.02, 105,541.43 and 20,427.65 is: 30,644.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,354.02 : 105,541.43 = 20,427.65 : x
  2. Step 2: Convert to fraction form
    70,354.02/105,541.43 = 20,427.65/x
  3. Step 3: Cross multiply
    70,354.02x = 105,541.43 × 20,427.65
  4. Step 4: Simplify right side
    70,354.02x = 2,155,962,762.69
  5. Step 5: Solve for x
    x = 2,155,962,762.69/70,354.02
  6. Step 6: Final answer
    x = 30,644.49

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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.