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Finding the Fourth Proportional to 163,911.20, 245,866.80 and 161,578.40

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Solution

The fourth proportional to 163,911.20, 245,866.80 and 161,578.40 is: 242,367.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,911.20 : 245,866.80 = 161,578.40 : x
  2. Step 2: Convert to fraction form
    163,911.20/245,866.80 = 161,578.40/x
  3. Step 3: Cross multiply
    163,911.20x = 245,866.80 × 161,578.40
  4. Step 4: Simplify right side
    163,911.20x = 39,726,764,157.12
  5. Step 5: Solve for x
    x = 39,726,764,157.12/163,911.20
  6. Step 6: Final answer
    x = 242,367.60

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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.