Home / 209,918.52-289,728-145,562.40

Finding the Fourth Proportional to 209,918.52, 289,728 and 145,562.40

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Solution

The fourth proportional to 209,918.52, 289,728 and 145,562.40 is: 200,904.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,918.52 : 289,728 = 145,562.40 : x
  2. Step 2: Convert to fraction form
    209,918.52/289,728 = 145,562.40/x
  3. Step 3: Cross multiply
    209,918.52x = 289,728 × 145,562.40
  4. Step 4: Simplify right side
    209,918.52x = 42,173,503,027.20
  5. Step 5: Solve for x
    x = 42,173,503,027.20/209,918.52
  6. Step 6: Final answer
    x = 200,904.16

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1.5x scale

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.