Home / 120,390.93-180,420.32-90,776.22

Finding the Fourth Proportional to 120,390.93, 180,420.32 and 90,776.22

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Solution

The fourth proportional to 120,390.93, 180,420.32 and 90,776.22 is: 136,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,390.93 : 180,420.32 = 90,776.22 : x
  2. Step 2: Convert to fraction form
    120,390.93/180,420.32 = 90,776.22/x
  3. Step 3: Cross multiply
    120,390.93x = 180,420.32 × 90,776.22
  4. Step 4: Simplify right side
    120,390.93x = 16,377,874,846.24
  5. Step 5: Solve for x
    x = 16,377,874,846.24/120,390.93
  6. Step 6: Final answer
    x = 136,039.11

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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.