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Finding the Fourth Proportional to 86,161.97, 118,894.45 and 47,915.32

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Solution

The fourth proportional to 86,161.97, 118,894.45 and 47,915.32 is: 66,118.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,161.97 : 118,894.45 = 47,915.32 : x
  2. Step 2: Convert to fraction form
    86,161.97/118,894.45 = 47,915.32/x
  3. Step 3: Cross multiply
    86,161.97x = 118,894.45 × 47,915.32
  4. Step 4: Simplify right side
    86,161.97x = 5,696,865,617.97
  5. Step 5: Solve for x
    x = 5,696,865,617.97/86,161.97
  6. Step 6: Final answer
    x = 66,118.10

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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.