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Finding the Fourth Proportional to 143,896.56, 215,907.12 and 77,258.88

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Solution

The fourth proportional to 143,896.56, 215,907.12 and 77,258.88 is: 115,921.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,896.56 : 215,907.12 = 77,258.88 : x
  2. Step 2: Convert to fraction form
    143,896.56/215,907.12 = 77,258.88/x
  3. Step 3: Cross multiply
    143,896.56x = 215,907.12 × 77,258.88
  4. Step 4: Simplify right side
    143,896.56x = 16,680,742,275.23
  5. Step 5: Solve for x
    x = 16,680,742,275.23/143,896.56
  6. Step 6: Final answer
    x = 115,921.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.