Home / 209,138.25-288,610.05-118,511.47

Finding the Fourth Proportional to 209,138.25, 288,610.05 and 118,511.47

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Solution

The fourth proportional to 209,138.25, 288,610.05 and 118,511.47 is: 163,545.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,138.25 : 288,610.05 = 118,511.47 : x
  2. Step 2: Convert to fraction form
    209,138.25/288,610.05 = 118,511.47/x
  3. Step 3: Cross multiply
    209,138.25x = 288,610.05 × 118,511.47
  4. Step 4: Simplify right side
    209,138.25x = 34,203,602,087.45
  5. Step 5: Solve for x
    x = 34,203,602,087.45/209,138.25
  6. Step 6: Final answer
    x = 163,545.41

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1.5x scale

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.