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Finding the Fourth Proportional to 243,368.80, 335,845.38 and 135,940.30

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Solution

The fourth proportional to 243,368.80, 335,845.38 and 135,940.30 is: 187,595.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,368.80 : 335,845.38 = 135,940.30 : x
  2. Step 2: Convert to fraction form
    243,368.80/335,845.38 = 135,940.30/x
  3. Step 3: Cross multiply
    243,368.80x = 335,845.38 × 135,940.30
  4. Step 4: Simplify right side
    243,368.80x = 45,654,921,710.81
  5. Step 5: Solve for x
    x = 45,654,921,710.81/243,368.80
  6. Step 6: Final answer
    x = 187,595.62

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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.