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Finding the Fourth Proportional to 97,212.40, 145,972.20 and 71,100.40

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Solution

The fourth proportional to 97,212.40, 145,972.20 and 71,100.40 is: 106,762.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,212.40 : 145,972.20 = 71,100.40 : x
  2. Step 2: Convert to fraction form
    97,212.40/145,972.20 = 71,100.40/x
  3. Step 3: Cross multiply
    97,212.40x = 145,972.20 × 71,100.40
  4. Step 4: Simplify right side
    97,212.40x = 10,378,681,808.88
  5. Step 5: Solve for x
    x = 10,378,681,808.88/97,212.40
  6. Step 6: Final answer
    x = 106,762.94

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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.