Home / 111,038.40-166,363.20-91,209.60

Finding the Fourth Proportional to 111,038.40, 166,363.20 and 91,209.60

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Solution

The fourth proportional to 111,038.40, 166,363.20 and 91,209.60 is: 136,654.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,038.40 : 166,363.20 = 91,209.60 : x
  2. Step 2: Convert to fraction form
    111,038.40/166,363.20 = 91,209.60/x
  3. Step 3: Cross multiply
    111,038.40x = 166,363.20 × 91,209.60
  4. Step 4: Simplify right side
    111,038.40x = 15,173,920,926.72
  5. Step 5: Solve for x
    x = 15,173,920,926.72/111,038.40
  6. Step 6: Final answer
    x = 136,654.72

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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.