Home / 129,410.40-178,586.28-72,821.82

Finding the Fourth Proportional to 129,410.40, 178,586.28 and 72,821.82

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Solution

The fourth proportional to 129,410.40, 178,586.28 and 72,821.82 is: 100,494.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,410.40 : 178,586.28 = 72,821.82 : x
  2. Step 2: Convert to fraction form
    129,410.40/178,586.28 = 72,821.82/x
  3. Step 3: Cross multiply
    129,410.40x = 178,586.28 × 72,821.82
  4. Step 4: Simplify right side
    129,410.40x = 13,004,977,936.63
  5. Step 5: Solve for x
    x = 13,004,977,936.63/129,410.40
  6. Step 6: Final answer
    x = 100,494.07

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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.