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Finding the Fourth Proportional to 81,808.80, 122,810.40 and 46,298.40

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Solution

The fourth proportional to 81,808.80, 122,810.40 and 46,298.40 is: 69,502.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.80 : 122,810.40 = 46,298.40 : x
  2. Step 2: Convert to fraction form
    81,808.80/122,810.40 = 46,298.40/x
  3. Step 3: Cross multiply
    81,808.80x = 122,810.40 × 46,298.40
  4. Step 4: Simplify right side
    81,808.80x = 5,685,925,023.36
  5. Step 5: Solve for x
    x = 5,685,925,023.36/81,808.80
  6. Step 6: Final answer
    x = 69,502.61

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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.