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Finding the Fourth Proportional to 85,635.61, 128,287.25 and 63,105.41

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Solution

The fourth proportional to 85,635.61, 128,287.25 and 63,105.41 is: 94,535.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,635.61 : 128,287.25 = 63,105.41 : x
  2. Step 2: Convert to fraction form
    85,635.61/128,287.25 = 63,105.41/x
  3. Step 3: Cross multiply
    85,635.61x = 128,287.25 × 63,105.41
  4. Step 4: Simplify right side
    85,635.61x = 8,095,619,750.86
  5. Step 5: Solve for x
    x = 8,095,619,750.86/85,635.61
  6. Step 6: Final answer
    x = 94,535.67

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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.