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Finding the Fourth Proportional to 113,511.40, 170,007.90 and 66,855.40

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Solution

The fourth proportional to 113,511.40, 170,007.90 and 66,855.40 is: 100,130.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,511.40 : 170,007.90 = 66,855.40 : x
  2. Step 2: Convert to fraction form
    113,511.40/170,007.90 = 66,855.40/x
  3. Step 3: Cross multiply
    113,511.40x = 170,007.90 × 66,855.40
  4. Step 4: Simplify right side
    113,511.40x = 11,365,946,157.66
  5. Step 5: Solve for x
    x = 11,365,946,157.66/113,511.40
  6. Step 6: Final answer
    x = 100,130.44

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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.