Home / 138,228.48-190,488.96-100,442.88

Finding the Fourth Proportional to 138,228.48, 190,488.96 and 100,442.88

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Solution

The fourth proportional to 138,228.48, 190,488.96 and 100,442.88 is: 138,417.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,228.48 : 190,488.96 = 100,442.88 : x
  2. Step 2: Convert to fraction form
    138,228.48/190,488.96 = 100,442.88/x
  3. Step 3: Cross multiply
    138,228.48x = 190,488.96 × 100,442.88
  4. Step 4: Simplify right side
    138,228.48x = 19,133,259,750.60
  5. Step 5: Solve for x
    x = 19,133,259,750.60/138,228.48
  6. Step 6: Final answer
    x = 138,417.64

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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.