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Finding the Fourth Proportional to 245,956.33, 368,973.33 and 86,076.91

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Solution

The fourth proportional to 245,956.33, 368,973.33 and 86,076.91 is: 129,128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,956.33 : 368,973.33 = 86,076.91 : x
  2. Step 2: Convert to fraction form
    245,956.33/368,973.33 = 86,076.91/x
  3. Step 3: Cross multiply
    245,956.33x = 368,973.33 × 86,076.91
  4. Step 4: Simplify right side
    245,956.33x = 31,760,084,118.81
  5. Step 5: Solve for x
    x = 31,760,084,118.81/245,956.33
  6. Step 6: Final answer
    x = 129,128.96

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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.