Home / 154,012.42-212,544.21-85,111.57

Finding the Fourth Proportional to 154,012.42, 212,544.21 and 85,111.57

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Solution

The fourth proportional to 154,012.42, 212,544.21 and 85,111.57 is: 117,457.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,012.42 : 212,544.21 = 85,111.57 : x
  2. Step 2: Convert to fraction form
    154,012.42/212,544.21 = 85,111.57/x
  3. Step 3: Cross multiply
    154,012.42x = 212,544.21 × 85,111.57
  4. Step 4: Simplify right side
    154,012.42x = 18,089,971,407.51
  5. Step 5: Solve for x
    x = 18,089,971,407.51/154,012.42
  6. Step 6: Final answer
    x = 117,457.87

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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.