Home / 121,121,420.80-181,383,532.80-80,512,038.40

Finding the Fourth Proportional to 121,121,420.80, 181,383,532.80 and 80,512,038.40

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Solution

The fourth proportional to 121,121,420.80, 181,383,532.80 and 80,512,038.40 is: 120,569,572.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,121,420.80 : 181,383,532.80 = 80,512,038.40 : x
  2. Step 2: Convert to fraction form
    121,121,420.80/181,383,532.80 = 80,512,038.40/x
  3. Step 3: Cross multiply
    121,121,420.80x = 181,383,532.80 × 80,512,038.40
  4. Step 4: Simplify right side
    121,121,420.80x = 14,603,557,957,921,262
  5. Step 5: Solve for x
    x = 14,603,557,957,921,262/121,121,420.80
  6. Step 6: Final answer
    x = 120,569,572.76

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1.5x scale

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.