Home / 129,374.45-178,536.69-72,012.54

Finding the Fourth Proportional to 129,374.45, 178,536.69 and 72,012.54

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Solution

The fourth proportional to 129,374.45, 178,536.69 and 72,012.54 is: 99,377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,374.45 : 178,536.69 = 72,012.54 : x
  2. Step 2: Convert to fraction form
    129,374.45/178,536.69 = 72,012.54/x
  3. Step 3: Cross multiply
    129,374.45x = 178,536.69 × 72,012.54
  4. Step 4: Simplify right side
    129,374.45x = 12,856,881,199.61
  5. Step 5: Solve for x
    x = 12,856,881,199.61/129,374.45
  6. Step 6: Final answer
    x = 99,377.28

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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.