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Finding the Fourth Proportional to 116,639.90, 160,940.48 and 65,645.84

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Solution

The fourth proportional to 116,639.90, 160,940.48 and 65,645.84 is: 90,578.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,639.90 : 160,940.48 = 65,645.84 : x
  2. Step 2: Convert to fraction form
    116,639.90/160,940.48 = 65,645.84/x
  3. Step 3: Cross multiply
    116,639.90x = 160,940.48 × 65,645.84
  4. Step 4: Simplify right side
    116,639.90x = 10,565,072,999.60
  5. Step 5: Solve for x
    x = 10,565,072,999.60/116,639.90
  6. Step 6: Final answer
    x = 90,578.55

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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.