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Finding the Fourth Proportional to 97,908.40, 146,643.90 and 80,412.40

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Solution

The fourth proportional to 97,908.40, 146,643.90 and 80,412.40 is: 120,438.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,908.40 : 146,643.90 = 80,412.40 : x
  2. Step 2: Convert to fraction form
    97,908.40/146,643.90 = 80,412.40/x
  3. Step 3: Cross multiply
    97,908.40x = 146,643.90 × 80,412.40
  4. Step 4: Simplify right side
    97,908.40x = 11,791,987,944.36
  5. Step 5: Solve for x
    x = 11,791,987,944.36/97,908.40
  6. Step 6: Final answer
    x = 120,438.98

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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.