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Finding the Fourth Proportional to 86,912.60, 130,368.90 and 86,912.60

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Solution

The fourth proportional to 86,912.60, 130,368.90 and 86,912.60 is: 130,368.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,912.60 : 130,368.90 = 86,912.60 : x
  2. Step 2: Convert to fraction form
    86,912.60/130,368.90 = 86,912.60/x
  3. Step 3: Cross multiply
    86,912.60x = 130,368.90 × 86,912.60
  4. Step 4: Simplify right side
    86,912.60x = 11,330,700,058.14
  5. Step 5: Solve for x
    x = 11,330,700,058.14/86,912.60
  6. Step 6: Final answer
    x = 130,368.90

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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.