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Finding the Fourth Proportional to 243,899.40, 365,849.10 and 138,923.40

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Solution

The fourth proportional to 243,899.40, 365,849.10 and 138,923.40 is: 208,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,899.40 : 365,849.10 = 138,923.40 : x
  2. Step 2: Convert to fraction form
    243,899.40/365,849.10 = 138,923.40/x
  3. Step 3: Cross multiply
    243,899.40x = 365,849.10 × 138,923.40
  4. Step 4: Simplify right side
    243,899.40x = 50,825,000,858.94
  5. Step 5: Solve for x
    x = 50,825,000,858.94/243,899.40
  6. Step 6: Final answer
    x = 208,385.10

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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.