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Finding the Fourth Proportional to 117,698.10, 162,422.71 and 66,720.45

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Solution

The fourth proportional to 117,698.10, 162,422.71 and 66,720.45 is: 92,073.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,698.10 : 162,422.71 = 66,720.45 : x
  2. Step 2: Convert to fraction form
    117,698.10/162,422.71 = 66,720.45/x
  3. Step 3: Cross multiply
    117,698.10x = 162,422.71 × 66,720.45
  4. Step 4: Simplify right side
    117,698.10x = 10,836,916,193.06
  5. Step 5: Solve for x
    x = 10,836,916,193.06/117,698.10
  6. Step 6: Final answer
    x = 92,073.84

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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.