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Finding the Fourth Proportional to 100,119.84, 138,110.04 and 64,315.14

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Solution

The fourth proportional to 100,119.84, 138,110.04 and 64,315.14 is: 88,719.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,119.84 : 138,110.04 = 64,315.14 : x
  2. Step 2: Convert to fraction form
    100,119.84/138,110.04 = 64,315.14/x
  3. Step 3: Cross multiply
    100,119.84x = 138,110.04 × 64,315.14
  4. Step 4: Simplify right side
    100,119.84x = 8,882,566,558.01
  5. Step 5: Solve for x
    x = 8,882,566,558.01/100,119.84
  6. Step 6: Final answer
    x = 88,719.34

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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.