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Finding the Fourth Proportional to 245,478.67, 368,101.67 and 85,498.81

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Solution

The fourth proportional to 245,478.67, 368,101.67 and 85,498.81 is: 128,207.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,478.67 : 368,101.67 = 85,498.81 : x
  2. Step 2: Convert to fraction form
    245,478.67/368,101.67 = 85,498.81/x
  3. Step 3: Cross multiply
    245,478.67x = 368,101.67 × 85,498.81
  4. Step 4: Simplify right side
    245,478.67x = 31,472,253,396.26
  5. Step 5: Solve for x
    x = 31,472,253,396.26/245,478.67
  6. Step 6: Final answer
    x = 128,207.69

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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.