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Finding the Fourth Proportional to 145,073.78, 200,403.64 and 137,979.84

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Solution

The fourth proportional to 145,073.78, 200,403.64 and 137,979.84 is: 190,604.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,073.78 : 200,403.64 = 137,979.84 : x
  2. Step 2: Convert to fraction form
    145,073.78/200,403.64 = 137,979.84/x
  3. Step 3: Cross multiply
    145,073.78x = 200,403.64 × 137,979.84
  4. Step 4: Simplify right side
    145,073.78x = 27,651,662,182.62
  5. Step 5: Solve for x
    x = 27,651,662,182.62/145,073.78
  6. Step 6: Final answer
    x = 190,604.13

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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.