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Finding the Fourth Proportional to 148,155.68, 204,459.76 and 81,087.68

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Solution

The fourth proportional to 148,155.68, 204,459.76 and 81,087.68 is: 111,903.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,155.68 : 204,459.76 = 81,087.68 : x
  2. Step 2: Convert to fraction form
    148,155.68/204,459.76 = 81,087.68/x
  3. Step 3: Cross multiply
    148,155.68x = 204,459.76 × 81,087.68
  4. Step 4: Simplify right side
    148,155.68x = 16,579,167,591.76
  5. Step 5: Solve for x
    x = 16,579,167,591.76/148,155.68
  6. Step 6: Final answer
    x = 111,903.69

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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.