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Finding the Fourth Proportional to 70,346.70, 105,525.52 and 20,427.62

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Solution

The fourth proportional to 70,346.70, 105,525.52 and 20,427.62 is: 30,643.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,346.70 : 105,525.52 = 20,427.62 : x
  2. Step 2: Convert to fraction form
    70,346.70/105,525.52 = 20,427.62/x
  3. Step 3: Cross multiply
    70,346.70x = 105,525.52 × 20,427.62
  4. Step 4: Simplify right side
    70,346.70x = 2,155,634,644.17
  5. Step 5: Solve for x
    x = 2,155,634,644.17/70,346.70
  6. Step 6: Final answer
    x = 30,643.01

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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.