Home / 208,124.19-287,016.47-138,149.74

Finding the Fourth Proportional to 208,124.19, 287,016.47 and 138,149.74

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Solution

The fourth proportional to 208,124.19, 287,016.47 and 138,149.74 is: 190,517.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,124.19 : 287,016.47 = 138,149.74 : x
  2. Step 2: Convert to fraction form
    208,124.19/287,016.47 = 138,149.74/x
  3. Step 3: Cross multiply
    208,124.19x = 287,016.47 × 138,149.74
  4. Step 4: Simplify right side
    208,124.19x = 39,651,250,015.47
  5. Step 5: Solve for x
    x = 39,651,250,015.47/208,124.19
  6. Step 6: Final answer
    x = 190,517.26

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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.