Home / 85,557.46-128,310.03-30,140.50

Finding the Fourth Proportional to 85,557.46, 128,310.03 and 30,140.50

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Solution

The fourth proportional to 85,557.46, 128,310.03 and 30,140.50 is: 45,201.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,557.46 : 128,310.03 = 30,140.50 : x
  2. Step 2: Convert to fraction form
    85,557.46/128,310.03 = 30,140.50/x
  3. Step 3: Cross multiply
    85,557.46x = 128,310.03 × 30,140.50
  4. Step 4: Simplify right side
    85,557.46x = 3,867,328,459.22
  5. Step 5: Solve for x
    x = 3,867,328,459.22/85,557.46
  6. Step 6: Final answer
    x = 45,201.53

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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.