Home / 289,721.48-434,621.91-90,004.64

Finding the Fourth Proportional to 289,721.48, 434,621.91 and 90,004.64

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Solution

The fourth proportional to 289,721.48, 434,621.91 and 90,004.64 is: 135,019.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,721.48 : 434,621.91 = 90,004.64 : x
  2. Step 2: Convert to fraction form
    289,721.48/434,621.91 = 90,004.64/x
  3. Step 3: Cross multiply
    289,721.48x = 434,621.91 × 90,004.64
  4. Step 4: Simplify right side
    289,721.48x = 39,117,988,545.66
  5. Step 5: Solve for x
    x = 39,117,988,545.66/289,721.48
  6. Step 6: Final answer
    x = 135,019.29

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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.