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Finding the Fourth Proportional to 145,543.65, 200,850.20 and 81,011.49

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Solution

The fourth proportional to 145,543.65, 200,850.20 and 81,011.49 is: 111,795.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,543.65 : 200,850.20 = 81,011.49 : x
  2. Step 2: Convert to fraction form
    145,543.65/200,850.20 = 81,011.49/x
  3. Step 3: Cross multiply
    145,543.65x = 200,850.20 × 81,011.49
  4. Step 4: Simplify right side
    145,543.65x = 16,271,173,968.80
  5. Step 5: Solve for x
    x = 16,271,173,968.80/145,543.65
  6. Step 6: Final answer
    x = 111,795.84

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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.