Home / 289,508.13-434,320.20-99,975.42

Finding the Fourth Proportional to 289,508.13, 434,320.20 and 99,975.42

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Solution

The fourth proportional to 289,508.13, 434,320.20 and 99,975.42 is: 149,983.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,508.13 : 434,320.20 = 99,975.42 : x
  2. Step 2: Convert to fraction form
    289,508.13/434,320.20 = 99,975.42/x
  3. Step 3: Cross multiply
    289,508.13x = 434,320.20 × 99,975.42
  4. Step 4: Simplify right side
    289,508.13x = 43,421,344,409.48
  5. Step 5: Solve for x
    x = 43,421,344,409.48/289,508.13
  6. Step 6: Final answer
    x = 149,983.16

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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.