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Finding the Fourth Proportional to 145,530.68, 200,724.08 and 128,504.88

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Solution

The fourth proportional to 145,530.68, 200,724.08 and 128,504.88 is: 177,241.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,530.68 : 200,724.08 = 128,504.88 : x
  2. Step 2: Convert to fraction form
    145,530.68/200,724.08 = 128,504.88/x
  3. Step 3: Cross multiply
    145,530.68x = 200,724.08 × 128,504.88
  4. Step 4: Simplify right side
    145,530.68x = 25,794,023,170.99
  5. Step 5: Solve for x
    x = 25,794,023,170.99/145,530.68
  6. Step 6: Final answer
    x = 177,241.14

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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.