Home / 138,128.77-190,634.57-77,701.96

Finding the Fourth Proportional to 138,128.77, 190,634.57 and 77,701.96

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Solution

The fourth proportional to 138,128.77, 190,634.57 and 77,701.96 is: 107,238.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128.77 : 190,634.57 = 77,701.96 : x
  2. Step 2: Convert to fraction form
    138,128.77/190,634.57 = 77,701.96/x
  3. Step 3: Cross multiply
    138,128.77x = 190,634.57 × 77,701.96
  4. Step 4: Simplify right side
    138,128.77x = 14,812,679,732.76
  5. Step 5: Solve for x
    x = 14,812,679,732.76/138,128.77
  6. Step 6: Final answer
    x = 107,238.19

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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.