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Finding the Fourth Proportional to 156,098.45, 215,415.86 and 84,478.45

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Solution

The fourth proportional to 156,098.45, 215,415.86 and 84,478.45 is: 116,580.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,098.45 : 215,415.86 = 84,478.45 : x
  2. Step 2: Convert to fraction form
    156,098.45/215,415.86 = 84,478.45/x
  3. Step 3: Cross multiply
    156,098.45x = 215,415.86 × 84,478.45
  4. Step 4: Simplify right side
    156,098.45x = 18,197,997,958.22
  5. Step 5: Solve for x
    x = 18,197,997,958.22/156,098.45
  6. Step 6: Final answer
    x = 116,580.26

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1.5x scale

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.