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Finding the Fourth Proportional to 170,938.40, 256,407.60 and 82,364.90

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Solution

The fourth proportional to 170,938.40, 256,407.60 and 82,364.90 is: 123,547.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,938.40 : 256,407.60 = 82,364.90 : x
  2. Step 2: Convert to fraction form
    170,938.40/256,407.60 = 82,364.90/x
  3. Step 3: Cross multiply
    170,938.40x = 256,407.60 × 82,364.90
  4. Step 4: Simplify right side
    170,938.40x = 21,118,986,333.24
  5. Step 5: Solve for x
    x = 21,118,986,333.24/170,938.40
  6. Step 6: Final answer
    x = 123,547.35

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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.