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Finding the Fourth Proportional to 120,783.71, 166,696.90 and 73,037.40

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Solution

The fourth proportional to 120,783.71, 166,696.90 and 73,037.40 is: 100,800.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,783.71 : 166,696.90 = 73,037.40 : x
  2. Step 2: Convert to fraction form
    120,783.71/166,696.90 = 73,037.40/x
  3. Step 3: Cross multiply
    120,783.71x = 166,696.90 × 73,037.40
  4. Step 4: Simplify right side
    120,783.71x = 12,175,108,164.06
  5. Step 5: Solve for x
    x = 12,175,108,164.06/120,783.71
  6. Step 6: Final answer
    x = 100,800.91

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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.