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Finding the Fourth Proportional to 137,879.52, 190,364.94 and 90,217.32

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Solution

The fourth proportional to 137,879.52, 190,364.94 and 90,217.32 is: 124,559.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,879.52 : 190,364.94 = 90,217.32 : x
  2. Step 2: Convert to fraction form
    137,879.52/190,364.94 = 90,217.32/x
  3. Step 3: Cross multiply
    137,879.52x = 190,364.94 × 90,217.32
  4. Step 4: Simplify right side
    137,879.52x = 17,174,214,708.76
  5. Step 5: Solve for x
    x = 17,174,214,708.76/137,879.52
  6. Step 6: Final answer
    x = 124,559.58

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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.