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Finding the Fourth Proportional to 140,241.08, 210,438.16 and 81,192.08

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Solution

The fourth proportional to 140,241.08, 210,438.16 and 81,192.08 is: 121,832.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,241.08 : 210,438.16 = 81,192.08 : x
  2. Step 2: Convert to fraction form
    140,241.08/210,438.16 = 81,192.08/x
  3. Step 3: Cross multiply
    140,241.08x = 210,438.16 × 81,192.08
  4. Step 4: Simplify right side
    140,241.08x = 17,085,911,921.77
  5. Step 5: Solve for x
    x = 17,085,911,921.77/140,241.08
  6. Step 6: Final answer
    x = 121,832.43

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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.