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Finding the Fourth Proportional to 136,639.70, 204,988.35 and 57,713.30

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Solution

The fourth proportional to 136,639.70, 204,988.35 and 57,713.30 is: 86,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,639.70 : 204,988.35 = 57,713.30 : x
  2. Step 2: Convert to fraction form
    136,639.70/204,988.35 = 57,713.30/x
  3. Step 3: Cross multiply
    136,639.70x = 204,988.35 × 57,713.30
  4. Step 4: Simplify right side
    136,639.70x = 11,830,554,140.06
  5. Step 5: Solve for x
    x = 11,830,554,140.06/136,639.70
  6. Step 6: Final answer
    x = 86,582.11

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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.