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Finding the Fourth Proportional to 145,417.01, 200,680.35 and 90,998.78

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Solution

The fourth proportional to 145,417.01, 200,680.35 and 90,998.78 is: 125,581.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,417.01 : 200,680.35 = 90,998.78 : x
  2. Step 2: Convert to fraction form
    145,417.01/200,680.35 = 90,998.78/x
  3. Step 3: Cross multiply
    145,417.01x = 200,680.35 × 90,998.78
  4. Step 4: Simplify right side
    145,417.01x = 18,261,667,019.97
  5. Step 5: Solve for x
    x = 18,261,667,019.97/145,417.01
  6. Step 6: Final answer
    x = 125,581.37

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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.