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Finding the Fourth Proportional to 209,915.80, 314,672.10 and 69,602.20

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Solution

The fourth proportional to 209,915.80, 314,672.10 and 69,602.20 is: 104,336.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,915.80 : 314,672.10 = 69,602.20 : x
  2. Step 2: Convert to fraction form
    209,915.80/314,672.10 = 69,602.20/x
  3. Step 3: Cross multiply
    209,915.80x = 314,672.10 × 69,602.20
  4. Step 4: Simplify right side
    209,915.80x = 21,901,870,438.62
  5. Step 5: Solve for x
    x = 21,901,870,438.62/209,915.80
  6. Step 6: Final answer
    x = 104,336.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.