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Finding the Fourth Proportional to 81,133.60, 121,746.22 and 43,692.88

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Solution

The fourth proportional to 81,133.60, 121,746.22 and 43,692.88 is: 65,564.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.60 : 121,746.22 = 43,692.88 : x
  2. Step 2: Convert to fraction form
    81,133.60/121,746.22 = 43,692.88/x
  3. Step 3: Cross multiply
    81,133.60x = 121,746.22 × 43,692.88
  4. Step 4: Simplify right side
    81,133.60x = 5,319,442,980.91
  5. Step 5: Solve for x
    x = 5,319,442,980.91/81,133.60
  6. Step 6: Final answer
    x = 65,564.00

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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.