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Finding the Fourth Proportional to 155,881.69, 215,098.44 and 87,894.61

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Solution

The fourth proportional to 155,881.69, 215,098.44 and 87,894.61 is: 121,284.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,881.69 : 215,098.44 = 87,894.61 : x
  2. Step 2: Convert to fraction form
    155,881.69/215,098.44 = 87,894.61/x
  3. Step 3: Cross multiply
    155,881.69x = 215,098.44 × 87,894.61
  4. Step 4: Simplify right side
    155,881.69x = 18,905,993,495.41
  5. Step 5: Solve for x
    x = 18,905,993,495.41/155,881.69
  6. Step 6: Final answer
    x = 121,284.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.