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Finding the Fourth Proportional to 170,809.40, 256,369.58 and 90,914.44

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Solution

The fourth proportional to 170,809.40, 256,369.58 and 90,914.44 is: 136,454.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,809.40 : 256,369.58 = 90,914.44 : x
  2. Step 2: Convert to fraction form
    170,809.40/256,369.58 = 90,914.44/x
  3. Step 3: Cross multiply
    170,809.40x = 256,369.58 × 90,914.44
  4. Step 4: Simplify right side
    170,809.40x = 23,307,696,798.74
  5. Step 5: Solve for x
    x = 23,307,696,798.74/170,809.40
  6. Step 6: Final answer
    x = 136,454.42

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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.