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Finding the Fourth Proportional to 85,134.84, 127,673.40 and 28,959.92

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Solution

The fourth proportional to 85,134.84, 127,673.40 and 28,959.92 is: 43,430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,134.84 : 127,673.40 = 28,959.92 : x
  2. Step 2: Convert to fraction form
    85,134.84/127,673.40 = 28,959.92/x
  3. Step 3: Cross multiply
    85,134.84x = 127,673.40 × 28,959.92
  4. Step 4: Simplify right side
    85,134.84x = 3,697,411,450.13
  5. Step 5: Solve for x
    x = 3,697,411,450.13/85,134.84
  6. Step 6: Final answer
    x = 43,430.06

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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.