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Finding the Fourth Proportional to 70,071.04, 105,090.80 and 20,140.01

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Solution

The fourth proportional to 70,071.04, 105,090.80 and 20,140.01 is: 30,205.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,071.04 : 105,090.80 = 20,140.01 : x
  2. Step 2: Convert to fraction form
    70,071.04/105,090.80 = 20,140.01/x
  3. Step 3: Cross multiply
    70,071.04x = 105,090.80 × 20,140.01
  4. Step 4: Simplify right side
    70,071.04x = 2,116,529,136.75
  5. Step 5: Solve for x
    x = 2,116,529,136.75/70,071.04
  6. Step 6: Final answer
    x = 30,205.48

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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.