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Finding the Fourth Proportional to 129,647.44, 178,913.47 and 70,031.44

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Solution

The fourth proportional to 129,647.44, 178,913.47 and 70,031.44 is: 96,643.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,647.44 : 178,913.47 = 70,031.44 : x
  2. Step 2: Convert to fraction form
    129,647.44/178,913.47 = 70,031.44/x
  3. Step 3: Cross multiply
    129,647.44x = 178,913.47 × 70,031.44
  4. Step 4: Simplify right side
    129,647.44x = 12,529,567,317.13
  5. Step 5: Solve for x
    x = 12,529,567,317.13/129,647.44
  6. Step 6: Final answer
    x = 96,643.39

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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.