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Finding the Fourth Proportional to 98,017.20, 147,025.80 and 81,410.40

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Solution

The fourth proportional to 98,017.20, 147,025.80 and 81,410.40 is: 122,115.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,017.20 : 147,025.80 = 81,410.40 : x
  2. Step 2: Convert to fraction form
    98,017.20/147,025.80 = 81,410.40/x
  3. Step 3: Cross multiply
    98,017.20x = 147,025.80 × 81,410.40
  4. Step 4: Simplify right side
    98,017.20x = 11,969,429,188.32
  5. Step 5: Solve for x
    x = 11,969,429,188.32/98,017.20
  6. Step 6: Final answer
    x = 122,115.60

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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.