Home / 205,439.63-307,633.35-142,172.15

Finding the Fourth Proportional to 205,439.63, 307,633.35 and 142,172.15

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Solution

The fourth proportional to 205,439.63, 307,633.35 and 142,172.15 is: 212,894.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,439.63 : 307,633.35 = 142,172.15 : x
  2. Step 2: Convert to fraction form
    205,439.63/307,633.35 = 142,172.15/x
  3. Step 3: Cross multiply
    205,439.63x = 307,633.35 × 142,172.15
  4. Step 4: Simplify right side
    205,439.63x = 43,736,894,781.20
  5. Step 5: Solve for x
    x = 43,736,894,781.20/205,439.63
  6. Step 6: Final answer
    x = 212,894.15

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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.