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Finding the Fourth Proportional to 98,211.40, 147,098.40 and 80,715.40

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Solution

The fourth proportional to 98,211.40, 147,098.40 and 80,715.40 is: 120,893.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,211.40 : 147,098.40 = 80,715.40 : x
  2. Step 2: Convert to fraction form
    98,211.40/147,098.40 = 80,715.40/x
  3. Step 3: Cross multiply
    98,211.40x = 147,098.40 × 80,715.40
  4. Step 4: Simplify right side
    98,211.40x = 11,873,106,195.36
  5. Step 5: Solve for x
    x = 11,873,106,195.36/98,211.40
  6. Step 6: Final answer
    x = 120,893.36

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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.