Home / 209,953,805.70-314,930,708.55-128,324,468.10

Finding the Fourth Proportional to 209,953,805.70, 314,930,708.55 and 128,324,468.10

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Solution

The fourth proportional to 209,953,805.70, 314,930,708.55 and 128,324,468.10 is: 192,486,702.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,953,805.70 : 314,930,708.55 = 128,324,468.10 : x
  2. Step 2: Convert to fraction form
    209,953,805.70/314,930,708.55 = 128,324,468.10/x
  3. Step 3: Cross multiply
    209,953,805.70x = 314,930,708.55 × 128,324,468.10
  4. Step 4: Simplify right side
    209,953,805.70x = 40,413,315,663,034,872
  5. Step 5: Solve for x
    x = 40,413,315,663,034,872/209,953,805.70
  6. Step 6: Final answer
    x = 192,486,702.15

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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.