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Finding the Fourth Proportional to 163,620.20, 245,430.30 and 161,287.40

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Solution

The fourth proportional to 163,620.20, 245,430.30 and 161,287.40 is: 241,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,620.20 : 245,430.30 = 161,287.40 : x
  2. Step 2: Convert to fraction form
    163,620.20/245,430.30 = 161,287.40/x
  3. Step 3: Cross multiply
    163,620.20x = 245,430.30 × 161,287.40
  4. Step 4: Simplify right side
    163,620.20x = 39,584,814,968.22
  5. Step 5: Solve for x
    x = 39,584,814,968.22/163,620.20
  6. Step 6: Final answer
    x = 241,931.10

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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.