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Finding the Fourth Proportional to 155,803, 215,003.58 and 87,823.96

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Solution

The fourth proportional to 155,803, 215,003.58 and 87,823.96 is: 121,194.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,803 : 215,003.58 = 87,823.96 : x
  2. Step 2: Convert to fraction form
    155,803/215,003.58 = 87,823.96/x
  3. Step 3: Cross multiply
    155,803x = 215,003.58 × 87,823.96
  4. Step 4: Simplify right side
    155,803x = 18,882,465,809.78
  5. Step 5: Solve for x
    x = 18,882,465,809.78/155,803
  6. Step 6: Final answer
    x = 121,194.49

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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.