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Finding the Fourth Proportional to 170,810.39, 256,371.08 and 90,915.44

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Solution

The fourth proportional to 170,810.39, 256,371.08 and 90,915.44 is: 136,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,810.39 : 256,371.08 = 90,915.44 : x
  2. Step 2: Convert to fraction form
    170,810.39/256,371.08 = 90,915.44/x
  3. Step 3: Cross multiply
    170,810.39x = 256,371.08 × 90,915.44
  4. Step 4: Simplify right side
    170,810.39x = 23,308,087,805.04
  5. Step 5: Solve for x
    x = 23,308,087,805.04/170,810.39
  6. Step 6: Final answer
    x = 136,455.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.