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Finding the Fourth Proportional to 81,903.60, 122,859.45 and 42,537.60

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Solution

The fourth proportional to 81,903.60, 122,859.45 and 42,537.60 is: 63,808.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,903.60 : 122,859.45 = 42,537.60 : x
  2. Step 2: Convert to fraction form
    81,903.60/122,859.45 = 42,537.60/x
  3. Step 3: Cross multiply
    81,903.60x = 122,859.45 × 42,537.60
  4. Step 4: Simplify right side
    81,903.60x = 5,226,146,140.32
  5. Step 5: Solve for x
    x = 5,226,146,140.32/81,903.60
  6. Step 6: Final answer
    x = 63,808.50

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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.