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Finding the Fourth Proportional to 208,090.80, 312,186.60 and 60,346.80

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Solution

The fourth proportional to 208,090.80, 312,186.60 and 60,346.80 is: 90,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,090.80 : 312,186.60 = 60,346.80 : x
  2. Step 2: Convert to fraction form
    208,090.80/312,186.60 = 60,346.80/x
  3. Step 3: Cross multiply
    208,090.80x = 312,186.60 × 60,346.80
  4. Step 4: Simplify right side
    208,090.80x = 18,839,462,312.88
  5. Step 5: Solve for x
    x = 18,839,462,312.88/208,090.80
  6. Step 6: Final answer
    x = 90,534.82

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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.