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Finding the Fourth Proportional to 120,673.80, 166,580.15 and 72,915.19

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Solution

The fourth proportional to 120,673.80, 166,580.15 and 72,915.19 is: 100,653.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,673.80 : 166,580.15 = 72,915.19 : x
  2. Step 2: Convert to fraction form
    120,673.80/166,580.15 = 72,915.19/x
  3. Step 3: Cross multiply
    120,673.80x = 166,580.15 × 72,915.19
  4. Step 4: Simplify right side
    120,673.80x = 12,146,222,506.45
  5. Step 5: Solve for x
    x = 12,146,222,506.45/120,673.80
  6. Step 6: Final answer
    x = 100,653.35

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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.