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Finding the Fourth Proportional to 98,008.40, 147,012.60 and 66,904.40

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Solution

The fourth proportional to 98,008.40, 147,012.60 and 66,904.40 is: 100,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,008.40 : 147,012.60 = 66,904.40 : x
  2. Step 2: Convert to fraction form
    98,008.40/147,012.60 = 66,904.40/x
  3. Step 3: Cross multiply
    98,008.40x = 147,012.60 × 66,904.40
  4. Step 4: Simplify right side
    98,008.40x = 9,835,789,795.44
  5. Step 5: Solve for x
    x = 9,835,789,795.44/98,008.40
  6. Step 6: Final answer
    x = 100,356.60

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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.