Home / 138,276.92-190,742.63-87,271.52

Finding the Fourth Proportional to 138,276.92, 190,742.63 and 87,271.52

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Solution

The fourth proportional to 138,276.92, 190,742.63 and 87,271.52 is: 120,384.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,276.92 : 190,742.63 = 87,271.52 : x
  2. Step 2: Convert to fraction form
    138,276.92/190,742.63 = 87,271.52/x
  3. Step 3: Cross multiply
    138,276.92x = 190,742.63 × 87,271.52
  4. Step 4: Simplify right side
    138,276.92x = 16,646,399,248.90
  5. Step 5: Solve for x
    x = 16,646,399,248.90/138,276.92
  6. Step 6: Final answer
    x = 120,384.51

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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.