Home / 138,276.42-190,741.94-87,271.02

Finding the Fourth Proportional to 138,276.42, 190,741.94 and 87,271.02

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Solution

The fourth proportional to 138,276.42, 190,741.94 and 87,271.02 is: 120,383.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,276.42 : 190,741.94 = 87,271.02 : x
  2. Step 2: Convert to fraction form
    138,276.42/190,741.94 = 87,271.02/x
  3. Step 3: Cross multiply
    138,276.42x = 190,741.94 × 87,271.02
  4. Step 4: Simplify right side
    138,276.42x = 16,646,243,551.49
  5. Step 5: Solve for x
    x = 16,646,243,551.49/138,276.42
  6. Step 6: Final answer
    x = 120,383.82

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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.