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Finding the Fourth Proportional to 145,521.25, 200,789.08 and 85,080.20

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Solution

The fourth proportional to 145,521.25, 200,789.08 and 85,080.20 is: 117,392.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,521.25 : 200,789.08 = 85,080.20 : x
  2. Step 2: Convert to fraction form
    145,521.25/200,789.08 = 85,080.20/x
  3. Step 3: Cross multiply
    145,521.25x = 200,789.08 × 85,080.20
  4. Step 4: Simplify right side
    145,521.25x = 17,083,174,432.29
  5. Step 5: Solve for x
    x = 17,083,174,432.29/145,521.25
  6. Step 6: Final answer
    x = 117,392.99

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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.