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Finding the Fourth Proportional to 97,475.21, 145,880.13 and 81,698.05

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Solution

The fourth proportional to 97,475.21, 145,880.13 and 81,698.05 is: 122,268.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,475.21 : 145,880.13 = 81,698.05 : x
  2. Step 2: Convert to fraction form
    97,475.21/145,880.13 = 81,698.05/x
  3. Step 3: Cross multiply
    97,475.21x = 145,880.13 × 81,698.05
  4. Step 4: Simplify right side
    97,475.21x = 11,918,122,154.75
  5. Step 5: Solve for x
    x = 11,918,122,154.75/97,475.21
  6. Step 6: Final answer
    x = 122,268.24

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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.