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Finding the Fourth Proportional to 97,215.80, 145,434.90 and 84,212.60

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Solution

The fourth proportional to 97,215.80, 145,434.90 and 84,212.60 is: 125,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,215.80 : 145,434.90 = 84,212.60 : x
  2. Step 2: Convert to fraction form
    97,215.80/145,434.90 = 84,212.60/x
  3. Step 3: Cross multiply
    97,215.80x = 145,434.90 × 84,212.60
  4. Step 4: Simplify right side
    97,215.80x = 12,247,451,059.74
  5. Step 5: Solve for x
    x = 12,247,451,059.74/97,215.80
  6. Step 6: Final answer
    x = 125,982.10

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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.