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Finding the Fourth Proportional to 117,638.58, 162,347.46 and 66,661.20

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Solution

The fourth proportional to 117,638.58, 162,347.46 and 66,661.20 is: 91,995.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,638.58 : 162,347.46 = 66,661.20 : x
  2. Step 2: Convert to fraction form
    117,638.58/162,347.46 = 66,661.20/x
  3. Step 3: Cross multiply
    117,638.58x = 162,347.46 × 66,661.20
  4. Step 4: Simplify right side
    117,638.58x = 10,822,277,269.63
  5. Step 5: Solve for x
    x = 10,822,277,269.63/117,638.58
  6. Step 6: Final answer
    x = 91,995.99

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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.