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Finding the Fourth Proportional to 111,225.52, 166,419.68 and 78,010.40

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Solution

The fourth proportional to 111,225.52, 166,419.68 and 78,010.40 is: 116,722.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,225.52 : 166,419.68 = 78,010.40 : x
  2. Step 2: Convert to fraction form
    111,225.52/166,419.68 = 78,010.40/x
  3. Step 3: Cross multiply
    111,225.52x = 166,419.68 × 78,010.40
  4. Step 4: Simplify right side
    111,225.52x = 12,982,465,804.67
  5. Step 5: Solve for x
    x = 12,982,465,804.67/111,225.52
  6. Step 6: Final answer
    x = 116,722.01

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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.