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Finding the Fourth Proportional to 155,953.68, 215,216.10 and 84,333.72

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Solution

The fourth proportional to 155,953.68, 215,216.10 and 84,333.72 is: 116,380.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,953.68 : 215,216.10 = 84,333.72 : x
  2. Step 2: Convert to fraction form
    155,953.68/215,216.10 = 84,333.72/x
  3. Step 3: Cross multiply
    155,953.68x = 215,216.10 × 84,333.72
  4. Step 4: Simplify right side
    155,953.68x = 18,149,974,316.89
  5. Step 5: Solve for x
    x = 18,149,974,316.89/155,953.68
  6. Step 6: Final answer
    x = 116,380.55

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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.