Home / 85,375.11-128,048.22-31,328.67

Finding the Fourth Proportional to 85,375.11, 128,048.22 and 31,328.67

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Solution

The fourth proportional to 85,375.11, 128,048.22 and 31,328.67 is: 46,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,375.11 : 128,048.22 = 31,328.67 : x
  2. Step 2: Convert to fraction form
    85,375.11/128,048.22 = 31,328.67/x
  3. Step 3: Cross multiply
    85,375.11x = 128,048.22 × 31,328.67
  4. Step 4: Simplify right side
    85,375.11x = 4,011,580,428.47
  5. Step 5: Solve for x
    x = 4,011,580,428.47/85,375.11
  6. Step 6: Final answer
    x = 46,987.70

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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.