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Finding the Fourth Proportional to 245,581.74, 368,433.90 and 85,659.98

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Solution

The fourth proportional to 245,581.74, 368,433.90 and 85,659.98 is: 128,511.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,581.74 : 368,433.90 = 85,659.98 : x
  2. Step 2: Convert to fraction form
    245,581.74/368,433.90 = 85,659.98/x
  3. Step 3: Cross multiply
    245,581.74x = 368,433.90 × 85,659.98
  4. Step 4: Simplify right side
    245,581.74x = 31,560,038,663.15
  5. Step 5: Solve for x
    x = 31,560,038,663.15/245,581.74
  6. Step 6: Final answer
    x = 128,511.34

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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.