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Finding the Fourth Proportional to 156,303.54, 215,698.59 and 84,685.50

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Solution

The fourth proportional to 156,303.54, 215,698.59 and 84,685.50 is: 116,865.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,303.54 : 215,698.59 = 84,685.50 : x
  2. Step 2: Convert to fraction form
    156,303.54/215,698.59 = 84,685.50/x
  3. Step 3: Cross multiply
    156,303.54x = 215,698.59 × 84,685.50
  4. Step 4: Simplify right side
    156,303.54x = 18,266,542,943.45
  5. Step 5: Solve for x
    x = 18,266,542,943.45/156,303.54
  6. Step 6: Final answer
    x = 116,865.83

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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.