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Finding the Fourth Proportional to 153,878.40, 230,817.60 and 83,721.60

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Solution

The fourth proportional to 153,878.40, 230,817.60 and 83,721.60 is: 125,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,878.40 : 230,817.60 = 83,721.60 : x
  2. Step 2: Convert to fraction form
    153,878.40/230,817.60 = 83,721.60/x
  3. Step 3: Cross multiply
    153,878.40x = 230,817.60 × 83,721.60
  4. Step 4: Simplify right side
    153,878.40x = 19,324,418,780.16
  5. Step 5: Solve for x
    x = 19,324,418,780.16/153,878.40
  6. Step 6: Final answer
    x = 125,582.40

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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.