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Finding the Fourth Proportional to 129,573.79, 178,817.94 and 75,876.10

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Solution

The fourth proportional to 129,573.79, 178,817.94 and 75,876.10 is: 104,712.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,573.79 : 178,817.94 = 75,876.10 : x
  2. Step 2: Convert to fraction form
    129,573.79/178,817.94 = 75,876.10/x
  3. Step 3: Cross multiply
    129,573.79x = 178,817.94 × 75,876.10
  4. Step 4: Simplify right side
    129,573.79x = 13,568,007,897.23
  5. Step 5: Solve for x
    x = 13,568,007,897.23/129,573.79
  6. Step 6: Final answer
    x = 104,712.60

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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.