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Finding the Fourth Proportional to 145,147.79, 200,303.79 and 81,485.70

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Solution

The fourth proportional to 145,147.79, 200,303.79 and 81,485.70 is: 112,450.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,147.79 : 200,303.79 = 81,485.70 : x
  2. Step 2: Convert to fraction form
    145,147.79/200,303.79 = 81,485.70/x
  3. Step 3: Cross multiply
    145,147.79x = 200,303.79 × 81,485.70
  4. Step 4: Simplify right side
    145,147.79x = 16,321,894,540.80
  5. Step 5: Solve for x
    x = 16,321,894,540.80/145,147.79
  6. Step 6: Final answer
    x = 112,450.18

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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.