Home / 85,541.20-128,332.70-60,289.96

Finding the Fourth Proportional to 85,541.20, 128,332.70 and 60,289.96

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Solution

The fourth proportional to 85,541.20, 128,332.70 and 60,289.96 is: 90,449.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,541.20 : 128,332.70 = 60,289.96 : x
  2. Step 2: Convert to fraction form
    85,541.20/128,332.70 = 60,289.96/x
  3. Step 3: Cross multiply
    85,541.20x = 128,332.70 × 60,289.96
  4. Step 4: Simplify right side
    85,541.20x = 7,737,173,349.69
  5. Step 5: Solve for x
    x = 7,737,173,349.69/85,541.20
  6. Step 6: Final answer
    x = 90,449.67

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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.