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Finding the Fourth Proportional to 85,911.14, 128,916.93 and 35,987.00

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Solution

The fourth proportional to 85,911.14, 128,916.93 and 35,987.00 is: 54,001.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,911.14 : 128,916.93 = 35,987.00 : x
  2. Step 2: Convert to fraction form
    85,911.14/128,916.93 = 35,987.00/x
  3. Step 3: Cross multiply
    85,911.14x = 128,916.93 × 35,987.00
  4. Step 4: Simplify right side
    85,911.14x = 4,639,332,915.33
  5. Step 5: Solve for x
    x = 4,639,332,915.33/85,911.14
  6. Step 6: Final answer
    x = 54,001.53

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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.