Home / 153,708.14-212,116.78-85,725.20

Finding the Fourth Proportional to 153,708.14, 212,116.78 and 85,725.20

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Solution

The fourth proportional to 153,708.14, 212,116.78 and 85,725.20 is: 118,300.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,708.14 : 212,116.78 = 85,725.20 : x
  2. Step 2: Convert to fraction form
    153,708.14/212,116.78 = 85,725.20/x
  3. Step 3: Cross multiply
    153,708.14x = 212,116.78 × 85,725.20
  4. Step 4: Simplify right side
    153,708.14x = 18,183,753,388.86
  5. Step 5: Solve for x
    x = 18,183,753,388.86/153,708.14
  6. Step 6: Final answer
    x = 118,300.52

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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.