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Finding the Fourth Proportional to 138,230.48, 190,491.72 and 100,444.88

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Solution

The fourth proportional to 138,230.48, 190,491.72 and 100,444.88 is: 138,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,230.48 : 190,491.72 = 100,444.88 : x
  2. Step 2: Convert to fraction form
    138,230.48/190,491.72 = 100,444.88/x
  3. Step 3: Cross multiply
    138,230.48x = 190,491.72 × 100,444.88
  4. Step 4: Simplify right side
    138,230.48x = 19,133,917,956.39
  5. Step 5: Solve for x
    x = 19,133,917,956.39/138,230.48
  6. Step 6: Final answer
    x = 138,420.40

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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.