Home / 66,921.20-100,398.36-47,238.32

Finding the Fourth Proportional to 66,921.20, 100,398.36 and 47,238.32

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Solution

The fourth proportional to 66,921.20, 100,398.36 and 47,238.32 is: 70,869.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,921.20 : 100,398.36 = 47,238.32 : x
  2. Step 2: Convert to fraction form
    66,921.20/100,398.36 = 47,238.32/x
  3. Step 3: Cross multiply
    66,921.20x = 100,398.36 × 47,238.32
  4. Step 4: Simplify right side
    66,921.20x = 4,742,649,857.16
  5. Step 5: Solve for x
    x = 4,742,649,857.16/66,921.20
  6. Step 6: Final answer
    x = 70,869.17

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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.