Home / 280,666.12-387,189.30-161,365

Finding the Fourth Proportional to 280,666.12, 387,189.30 and 161,365

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Solution

The fourth proportional to 280,666.12, 387,189.30 and 161,365 is: 222,608.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,666.12 : 387,189.30 = 161,365 : x
  2. Step 2: Convert to fraction form
    280,666.12/387,189.30 = 161,365/x
  3. Step 3: Cross multiply
    280,666.12x = 387,189.30 × 161,365
  4. Step 4: Simplify right side
    280,666.12x = 62,478,801,394.50
  5. Step 5: Solve for x
    x = 62,478,801,394.50/280,666.12
  6. Step 6: Final answer
    x = 222,608.99

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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.