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Finding the Fourth Proportional to 129,647.94, 178,914.16 and 70,031.94

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Solution

The fourth proportional to 129,647.94, 178,914.16 and 70,031.94 is: 96,644.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,647.94 : 178,914.16 = 70,031.94 : x
  2. Step 2: Convert to fraction form
    129,647.94/178,914.16 = 70,031.94/x
  3. Step 3: Cross multiply
    129,647.94x = 178,914.16 × 70,031.94
  4. Step 4: Simplify right side
    129,647.94x = 12,529,705,718.27
  5. Step 5: Solve for x
    x = 12,529,705,718.27/129,647.94
  6. Step 6: Final answer
    x = 96,644.08

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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.