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Finding the Fourth Proportional to 136,912.60, 205,215.30 and 58,013.40

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Solution

The fourth proportional to 136,912.60, 205,215.30 and 58,013.40 is: 86,955.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,912.60 : 205,215.30 = 58,013.40 : x
  2. Step 2: Convert to fraction form
    136,912.60/205,215.30 = 58,013.40/x
  3. Step 3: Cross multiply
    136,912.60x = 205,215.30 × 58,013.40
  4. Step 4: Simplify right side
    136,912.60x = 11,905,237,285.02
  5. Step 5: Solve for x
    x = 11,905,237,285.02/136,912.60
  6. Step 6: Final answer
    x = 86,955.02

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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.