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Finding the Fourth Proportional to 111,335.60, 166,711.80 and 81,592.40

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Solution

The fourth proportional to 111,335.60, 166,711.80 and 81,592.40 is: 122,174.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,335.60 : 166,711.80 = 81,592.40 : x
  2. Step 2: Convert to fraction form
    111,335.60/166,711.80 = 81,592.40/x
  3. Step 3: Cross multiply
    111,335.60x = 166,711.80 × 81,592.40
  4. Step 4: Simplify right side
    111,335.60x = 13,602,415,870.32
  5. Step 5: Solve for x
    x = 13,602,415,870.32/111,335.60
  6. Step 6: Final answer
    x = 122,174.90

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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.