Home / 138,017.10-190,439.87-77,579.36

Finding the Fourth Proportional to 138,017.10, 190,439.87 and 77,579.36

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Solution

The fourth proportional to 138,017.10, 190,439.87 and 77,579.36 is: 107,046.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,017.10 : 190,439.87 = 77,579.36 : x
  2. Step 2: Convert to fraction form
    138,017.10/190,439.87 = 77,579.36/x
  3. Step 3: Cross multiply
    138,017.10x = 190,439.87 × 77,579.36
  4. Step 4: Simplify right side
    138,017.10x = 14,774,203,233.08
  5. Step 5: Solve for x
    x = 14,774,203,233.08/138,017.10
  6. Step 6: Final answer
    x = 107,046.18

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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.