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Finding the Fourth Proportional to 98,620.80, 147,931.20 and 68,440.20

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Solution

The fourth proportional to 98,620.80, 147,931.20 and 68,440.20 is: 102,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,620.80 : 147,931.20 = 68,440.20 : x
  2. Step 2: Convert to fraction form
    98,620.80/147,931.20 = 68,440.20/x
  3. Step 3: Cross multiply
    98,620.80x = 147,931.20 × 68,440.20
  4. Step 4: Simplify right side
    98,620.80x = 10,124,440,914.24
  5. Step 5: Solve for x
    x = 10,124,440,914.24/98,620.80
  6. Step 6: Final answer
    x = 102,660.30

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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.