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Finding the Fourth Proportional to 245,479.67, 368,103.16 and 85,499.81

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Solution

The fourth proportional to 245,479.67, 368,103.16 and 85,499.81 is: 128,209.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,479.67 : 368,103.16 = 85,499.81 : x
  2. Step 2: Convert to fraction form
    245,479.67/368,103.16 = 85,499.81/x
  3. Step 3: Cross multiply
    245,479.67x = 368,103.16 × 85,499.81
  4. Step 4: Simplify right side
    245,479.67x = 31,472,750,240.40
  5. Step 5: Solve for x
    x = 31,472,750,240.40/245,479.67
  6. Step 6: Final answer
    x = 128,209.19

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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.