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Finding the Fourth Proportional to 85,505.79, 127,632.52 and 75,405.70

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Solution

The fourth proportional to 85,505.79, 127,632.52 and 75,405.70 is: 112,556.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,505.79 : 127,632.52 = 75,405.70 : x
  2. Step 2: Convert to fraction form
    85,505.79/127,632.52 = 75,405.70/x
  3. Step 3: Cross multiply
    85,505.79x = 127,632.52 × 75,405.70
  4. Step 4: Simplify right side
    85,505.79x = 9,624,219,334.75
  5. Step 5: Solve for x
    x = 9,624,219,334.75/85,505.79
  6. Step 6: Final answer
    x = 112,556.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.