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Finding the Fourth Proportional to 70,655.50, 105,975.42 and 20,736.01

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Solution

The fourth proportional to 70,655.50, 105,975.42 and 20,736.01 is: 31,101.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,655.50 : 105,975.42 = 20,736.01 : x
  2. Step 2: Convert to fraction form
    70,655.50/105,975.42 = 20,736.01/x
  3. Step 3: Cross multiply
    70,655.50x = 105,975.42 × 20,736.01
  4. Step 4: Simplify right side
    70,655.50x = 2,197,507,368.87
  5. Step 5: Solve for x
    x = 2,197,507,368.87/70,655.50
  6. Step 6: Final answer
    x = 31,101.72

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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.