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Finding the Fourth Proportional to 100,907.40, 151,361.10 and 98,720.40

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Solution

The fourth proportional to 100,907.40, 151,361.10 and 98,720.40 is: 148,080.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,907.40 : 151,361.10 = 98,720.40 : x
  2. Step 2: Convert to fraction form
    100,907.40/151,361.10 = 98,720.40/x
  3. Step 3: Cross multiply
    100,907.40x = 151,361.10 × 98,720.40
  4. Step 4: Simplify right side
    100,907.40x = 14,942,428,336.44
  5. Step 5: Solve for x
    x = 14,942,428,336.44/100,907.40
  6. Step 6: Final answer
    x = 148,080.60

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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.