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Finding the Fourth Proportional to 219,463.20, 302,842.80 and 123,969.60

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Solution

The fourth proportional to 219,463.20, 302,842.80 and 123,969.60 is: 171,068.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,463.20 : 302,842.80 = 123,969.60 : x
  2. Step 2: Convert to fraction form
    219,463.20/302,842.80 = 123,969.60/x
  3. Step 3: Cross multiply
    219,463.20x = 302,842.80 × 123,969.60
  4. Step 4: Simplify right side
    219,463.20x = 37,543,300,778.88
  5. Step 5: Solve for x
    x = 37,543,300,778.88/219,463.20
  6. Step 6: Final answer
    x = 171,068.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.