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Finding the Fourth Proportional to 276,709.60, 415,064.40 and 89,721.10

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Solution

The fourth proportional to 276,709.60, 415,064.40 and 89,721.10 is: 134,581.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,709.60 : 415,064.40 = 89,721.10 : x
  2. Step 2: Convert to fraction form
    276,709.60/415,064.40 = 89,721.10/x
  3. Step 3: Cross multiply
    276,709.60x = 415,064.40 × 89,721.10
  4. Step 4: Simplify right side
    276,709.60x = 37,240,034,538.84
  5. Step 5: Solve for x
    x = 37,240,034,538.84/276,709.60
  6. Step 6: Final answer
    x = 134,581.65

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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.