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Finding the Fourth Proportional to 137,963.40, 190,458.39 and 90,289.58

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Solution

The fourth proportional to 137,963.40, 190,458.39 and 90,289.58 is: 124,644.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,963.40 : 190,458.39 = 90,289.58 : x
  2. Step 2: Convert to fraction form
    137,963.40/190,458.39 = 90,289.58/x
  3. Step 3: Cross multiply
    137,963.40x = 190,458.39 × 90,289.58
  4. Step 4: Simplify right side
    137,963.40x = 17,196,407,088.28
  5. Step 5: Solve for x
    x = 17,196,407,088.28/137,963.40
  6. Step 6: Final answer
    x = 124,644.70

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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.