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Finding the Fourth Proportional to 81,400.96, 122,113.68 and 28,810.96

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Solution

The fourth proportional to 81,400.96, 122,113.68 and 28,810.96 is: 43,220.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,400.96 : 122,113.68 = 28,810.96 : x
  2. Step 2: Convert to fraction form
    81,400.96/122,113.68 = 28,810.96/x
  3. Step 3: Cross multiply
    81,400.96x = 122,113.68 × 28,810.96
  4. Step 4: Simplify right side
    81,400.96x = 3,518,212,349.93
  5. Step 5: Solve for x
    x = 3,518,212,349.93/81,400.96
  6. Step 6: Final answer
    x = 43,220.77

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1.5x scale

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.