Home / 138,455.10-191,073.66-78,028.29

Finding the Fourth Proportional to 138,455.10, 191,073.66 and 78,028.29

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Solution

The fourth proportional to 138,455.10, 191,073.66 and 78,028.29 is: 107,682.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,455.10 : 191,073.66 = 78,028.29 : x
  2. Step 2: Convert to fraction form
    138,455.10/191,073.66 = 78,028.29/x
  3. Step 3: Cross multiply
    138,455.10x = 191,073.66 × 78,028.29
  4. Step 4: Simplify right side
    138,455.10x = 14,909,150,953.84
  5. Step 5: Solve for x
    x = 14,909,150,953.84/138,455.10
  6. Step 6: Final answer
    x = 107,682.21

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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.