Home / 289,301.23-434,021.16-120,727.78

Finding the Fourth Proportional to 289,301.23, 434,021.16 and 120,727.78

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Solution

The fourth proportional to 289,301.23, 434,021.16 and 120,727.78 is: 181,120.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,301.23 : 434,021.16 = 120,727.78 : x
  2. Step 2: Convert to fraction form
    289,301.23/434,021.16 = 120,727.78/x
  3. Step 3: Cross multiply
    289,301.23x = 434,021.16 × 120,727.78
  4. Step 4: Simplify right side
    289,301.23x = 52,398,411,119.82
  5. Step 5: Solve for x
    x = 52,398,411,119.82/289,301.23
  6. Step 6: Final answer
    x = 181,120.60

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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.