Home / 208,456.20-287,671.32-122,392.80

Finding the Fourth Proportional to 208,456.20, 287,671.32 and 122,392.80

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Solution

The fourth proportional to 208,456.20, 287,671.32 and 122,392.80 is: 168,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,456.20 : 287,671.32 = 122,392.80 : x
  2. Step 2: Convert to fraction form
    208,456.20/287,671.32 = 122,392.80/x
  3. Step 3: Cross multiply
    208,456.20x = 287,671.32 × 122,392.80
  4. Step 4: Simplify right side
    208,456.20x = 35,208,898,334.50
  5. Step 5: Solve for x
    x = 35,208,898,334.50/208,456.20
  6. Step 6: Final answer
    x = 168,903.10

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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.