Home / 131,438.08-181,445.10-76,982.69

Finding the Fourth Proportional to 131,438.08, 181,445.10 and 76,982.69

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Solution

The fourth proportional to 131,438.08, 181,445.10 and 76,982.69 is: 106,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,438.08 : 181,445.10 = 76,982.69 : x
  2. Step 2: Convert to fraction form
    131,438.08/181,445.10 = 76,982.69/x
  3. Step 3: Cross multiply
    131,438.08x = 181,445.10 × 76,982.69
  4. Step 4: Simplify right side
    131,438.08x = 13,968,131,369.83
  5. Step 5: Solve for x
    x = 13,968,131,369.83/131,438.08
  6. Step 6: Final answer
    x = 106,271.57

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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.