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Finding the Fourth Proportional to 108,698.80, 163,048.20 and 69,332.80

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Solution

The fourth proportional to 108,698.80, 163,048.20 and 69,332.80 is: 103,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,698.80 : 163,048.20 = 69,332.80 : x
  2. Step 2: Convert to fraction form
    108,698.80/163,048.20 = 69,332.80/x
  3. Step 3: Cross multiply
    108,698.80x = 163,048.20 × 69,332.80
  4. Step 4: Simplify right side
    108,698.80x = 11,304,588,240.96
  5. Step 5: Solve for x
    x = 11,304,588,240.96/108,698.80
  6. Step 6: Final answer
    x = 103,999.20

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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.