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Finding the Fourth Proportional to 163,760.40, 245,640.60 and 161,686.80

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Solution

The fourth proportional to 163,760.40, 245,640.60 and 161,686.80 is: 242,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,760.40 : 245,640.60 = 161,686.80 : x
  2. Step 2: Convert to fraction form
    163,760.40/245,640.60 = 161,686.80/x
  3. Step 3: Cross multiply
    163,760.40x = 245,640.60 × 161,686.80
  4. Step 4: Simplify right side
    163,760.40x = 39,716,842,564.08
  5. Step 5: Solve for x
    x = 39,716,842,564.08/163,760.40
  6. Step 6: Final answer
    x = 242,530.20

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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.