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Finding the Fourth Proportional to 103,332.60, 154,998.90 and 85,836.60

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Solution

The fourth proportional to 103,332.60, 154,998.90 and 85,836.60 is: 128,754.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,332.60 : 154,998.90 = 85,836.60 : x
  2. Step 2: Convert to fraction form
    103,332.60/154,998.90 = 85,836.60/x
  3. Step 3: Cross multiply
    103,332.60x = 154,998.90 × 85,836.60
  4. Step 4: Simplify right side
    103,332.60x = 13,304,578,579.74
  5. Step 5: Solve for x
    x = 13,304,578,579.74/103,332.60
  6. Step 6: Final answer
    x = 128,754.90

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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.