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Finding the Fourth Proportional to 85,365.20, 127,932.60 and 60,712.40

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Solution

The fourth proportional to 85,365.20, 127,932.60 and 60,712.40 is: 90,986.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,365.20 : 127,932.60 = 60,712.40 : x
  2. Step 2: Convert to fraction form
    85,365.20/127,932.60 = 60,712.40/x
  3. Step 3: Cross multiply
    85,365.20x = 127,932.60 × 60,712.40
  4. Step 4: Simplify right side
    85,365.20x = 7,767,095,184.24
  5. Step 5: Solve for x
    x = 7,767,095,184.24/85,365.20
  6. Step 6: Final answer
    x = 90,986.67

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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.