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Finding the Fourth Proportional to 129,646.88, 178,972.48 and 75,924.48

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Solution

The fourth proportional to 129,646.88, 178,972.48 and 75,924.48 is: 104,810.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,646.88 : 178,972.48 = 75,924.48 : x
  2. Step 2: Convert to fraction form
    129,646.88/178,972.48 = 75,924.48/x
  3. Step 3: Cross multiply
    129,646.88x = 178,972.48 × 75,924.48
  4. Step 4: Simplify right side
    129,646.88x = 13,588,392,478.31
  5. Step 5: Solve for x
    x = 13,588,392,478.31/129,646.88
  6. Step 6: Final answer
    x = 104,810.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.