Home / 138,297.91-190,857.15-77,868.54

Finding the Fourth Proportional to 138,297.91, 190,857.15 and 77,868.54

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Solution

The fourth proportional to 138,297.91, 190,857.15 and 77,868.54 is: 107,461.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,297.91 : 190,857.15 = 77,868.54 : x
  2. Step 2: Convert to fraction form
    138,297.91/190,857.15 = 77,868.54/x
  3. Step 3: Cross multiply
    138,297.91x = 190,857.15 × 77,868.54
  4. Step 4: Simplify right side
    138,297.91x = 14,861,767,619.06
  5. Step 5: Solve for x
    x = 14,861,767,619.06/138,297.91
  6. Step 6: Final answer
    x = 107,461.98

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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.