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Finding the Fourth Proportional to 85,367.20, 127,935.60 and 60,714.40

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Solution

The fourth proportional to 85,367.20, 127,935.60 and 60,714.40 is: 90,989.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,367.20 : 127,935.60 = 60,714.40 : x
  2. Step 2: Convert to fraction form
    85,367.20/127,935.60 = 60,714.40/x
  3. Step 3: Cross multiply
    85,367.20x = 127,935.60 × 60,714.40
  4. Step 4: Simplify right side
    85,367.20x = 7,767,533,192.64
  5. Step 5: Solve for x
    x = 7,767,533,192.64/85,367.20
  6. Step 6: Final answer
    x = 90,989.67

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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.