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Finding the Fourth Proportional to 205,055.80, 307,238.10 and 99,647.80

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Solution

The fourth proportional to 205,055.80, 307,238.10 and 99,647.80 is: 149,303.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,055.80 : 307,238.10 = 99,647.80 : x
  2. Step 2: Convert to fraction form
    205,055.80/307,238.10 = 99,647.80/x
  3. Step 3: Cross multiply
    205,055.80x = 307,238.10 × 99,647.80
  4. Step 4: Simplify right side
    205,055.80x = 30,615,600,741.18
  5. Step 5: Solve for x
    x = 30,615,600,741.18/205,055.80
  6. Step 6: Final answer
    x = 149,303.75

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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.