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Finding the Fourth Proportional to 268,511.86, 402,516.15 and 90,894.58

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Solution

The fourth proportional to 268,511.86, 402,516.15 and 90,894.58 is: 136,256.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,511.86 : 402,516.15 = 90,894.58 : x
  2. Step 2: Convert to fraction form
    268,511.86/402,516.15 = 90,894.58/x
  3. Step 3: Cross multiply
    268,511.86x = 402,516.15 × 90,894.58
  4. Step 4: Simplify right side
    268,511.86x = 36,586,536,397.47
  5. Step 5: Solve for x
    x = 36,586,536,397.47/268,511.86
  6. Step 6: Final answer
    x = 136,256.69

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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.