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Finding the Fourth Proportional to 279,066.65, 385,109.91 and 151,742.21

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Solution

The fourth proportional to 279,066.65, 385,109.91 and 151,742.21 is: 209,403.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,066.65 : 385,109.91 = 151,742.21 : x
  2. Step 2: Convert to fraction form
    279,066.65/385,109.91 = 151,742.21/x
  3. Step 3: Cross multiply
    279,066.65x = 385,109.91 × 151,742.21
  4. Step 4: Simplify right side
    279,066.65x = 58,437,426,910.75
  5. Step 5: Solve for x
    x = 58,437,426,910.75/279,066.65
  6. Step 6: Final answer
    x = 209,403.12

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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.