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Finding the Fourth Proportional to 81,430.05, 122,145.08 and 81,430.05

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Solution

The fourth proportional to 81,430.05, 122,145.08 and 81,430.05 is: 122,145.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.05 : 122,145.08 = 81,430.05 : x
  2. Step 2: Convert to fraction form
    81,430.05/122,145.08 = 81,430.05/x
  3. Step 3: Cross multiply
    81,430.05x = 122,145.08 × 81,430.05
  4. Step 4: Simplify right side
    81,430.05x = 9,946,279,564.50
  5. Step 5: Solve for x
    x = 9,946,279,564.50/81,430.05
  6. Step 6: Final answer
    x = 122,145.08

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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.