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Finding the Fourth Proportional to 145,485.44, 200,739.80 and 85,044.40

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Solution

The fourth proportional to 145,485.44, 200,739.80 and 85,044.40 is: 117,343.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,485.44 : 200,739.80 = 85,044.40 : x
  2. Step 2: Convert to fraction form
    145,485.44/200,739.80 = 85,044.40/x
  3. Step 3: Cross multiply
    145,485.44x = 200,739.80 × 85,044.40
  4. Step 4: Simplify right side
    145,485.44x = 17,071,795,847.12
  5. Step 5: Solve for x
    x = 17,071,795,847.12/145,485.44
  6. Step 6: Final answer
    x = 117,343.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.