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Finding the Fourth Proportional to 70,507, 105,750.08 and 20,573.70

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Solution

The fourth proportional to 70,507, 105,750.08 and 20,573.70 is: 30,857.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,507 : 105,750.08 = 20,573.70 : x
  2. Step 2: Convert to fraction form
    70,507/105,750.08 = 20,573.70/x
  3. Step 3: Cross multiply
    70,507x = 105,750.08 × 20,573.70
  4. Step 4: Simplify right side
    70,507x = 2,175,670,420.90
  5. Step 5: Solve for x
    x = 2,175,670,420.90/70,507
  6. Step 6: Final answer
    x = 30,857.51

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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.