Home / 129,012.55-178,037.49-72,424.33

Finding the Fourth Proportional to 129,012.55, 178,037.49 and 72,424.33

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Solution

The fourth proportional to 129,012.55, 178,037.49 and 72,424.33 is: 99,945.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,012.55 : 178,037.49 = 72,424.33 : x
  2. Step 2: Convert to fraction form
    129,012.55/178,037.49 = 72,424.33/x
  3. Step 3: Cross multiply
    129,012.55x = 178,037.49 × 72,424.33
  4. Step 4: Simplify right side
    129,012.55x = 12,894,245,754.63
  5. Step 5: Solve for x
    x = 12,894,245,754.63/129,012.55
  6. Step 6: Final answer
    x = 99,945.67

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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.