Home / 74,128.39-102,297.03-40,136.91

Finding the Fourth Proportional to 74,128.39, 102,297.03 and 40,136.91

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Solution

The fourth proportional to 74,128.39, 102,297.03 and 40,136.91 is: 55,388.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,128.39 : 102,297.03 = 40,136.91 : x
  2. Step 2: Convert to fraction form
    74,128.39/102,297.03 = 40,136.91/x
  3. Step 3: Cross multiply
    74,128.39x = 102,297.03 × 40,136.91
  4. Step 4: Simplify right side
    74,128.39x = 4,105,886,686.38
  5. Step 5: Solve for x
    x = 4,105,886,686.38/74,128.39
  6. Step 6: Final answer
    x = 55,388.86

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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.