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Finding the Fourth Proportional to 144,322.72, 199,251.48 and 90,653.68

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Solution

The fourth proportional to 144,322.72, 199,251.48 and 90,653.68 is: 125,156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,322.72 : 199,251.48 = 90,653.68 : x
  2. Step 2: Convert to fraction form
    144,322.72/199,251.48 = 90,653.68/x
  3. Step 3: Cross multiply
    144,322.72x = 199,251.48 × 90,653.68
  4. Step 4: Simplify right side
    144,322.72x = 18,062,879,907.45
  5. Step 5: Solve for x
    x = 18,062,879,907.45/144,322.72
  6. Step 6: Final answer
    x = 125,156.18

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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.