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Finding the Fourth Proportional to 104,154.80, 143,644.20 and 81,458.60

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Solution

The fourth proportional to 104,154.80, 143,644.20 and 81,458.60 is: 112,342.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,154.80 : 143,644.20 = 81,458.60 : x
  2. Step 2: Convert to fraction form
    104,154.80/143,644.20 = 81,458.60/x
  3. Step 3: Cross multiply
    104,154.80x = 143,644.20 × 81,458.60
  4. Step 4: Simplify right side
    104,154.80x = 11,701,055,430.12
  5. Step 5: Solve for x
    x = 11,701,055,430.12/104,154.80
  6. Step 6: Final answer
    x = 112,342.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.