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Finding the Fourth Proportional to 111,903.20, 154,433.41 and 61,602.20

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Solution

The fourth proportional to 111,903.20, 154,433.41 and 61,602.20 is: 85,014.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,903.20 : 154,433.41 = 61,602.20 : x
  2. Step 2: Convert to fraction form
    111,903.20/154,433.41 = 61,602.20/x
  3. Step 3: Cross multiply
    111,903.20x = 154,433.41 × 61,602.20
  4. Step 4: Simplify right side
    111,903.20x = 9,513,437,809.50
  5. Step 5: Solve for x
    x = 9,513,437,809.50/111,903.20
  6. Step 6: Final answer
    x = 85,014.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.