Home / 138,064.28-190,529.85-77,634.40

Finding the Fourth Proportional to 138,064.28, 190,529.85 and 77,634.40

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Solution

The fourth proportional to 138,064.28, 190,529.85 and 77,634.40 is: 107,136.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,064.28 : 190,529.85 = 77,634.40 : x
  2. Step 2: Convert to fraction form
    138,064.28/190,529.85 = 77,634.40/x
  3. Step 3: Cross multiply
    138,064.28x = 190,529.85 × 77,634.40
  4. Step 4: Simplify right side
    138,064.28x = 14,791,669,300.05
  5. Step 5: Solve for x
    x = 14,791,669,300.05/138,064.28
  6. Step 6: Final answer
    x = 107,136.11

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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.