Home / 136,985.28-189,012.96-77,357.76

Finding the Fourth Proportional to 136,985.28, 189,012.96 and 77,357.76

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Solution

The fourth proportional to 136,985.28, 189,012.96 and 77,357.76 is: 106,738.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,985.28 : 189,012.96 = 77,357.76 : x
  2. Step 2: Convert to fraction form
    136,985.28/189,012.96 = 77,357.76/x
  3. Step 3: Cross multiply
    136,985.28x = 189,012.96 × 77,357.76
  4. Step 4: Simplify right side
    136,985.28x = 14,621,619,196.57
  5. Step 5: Solve for x
    x = 14,621,619,196.57/136,985.28
  6. Step 6: Final answer
    x = 106,738.62

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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.