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Finding the Fourth Proportional to 156,391.79, 215,814.88 and 84,770.27

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Solution

The fourth proportional to 156,391.79, 215,814.88 and 84,770.27 is: 116,979.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,391.79 : 215,814.88 = 84,770.27 : x
  2. Step 2: Convert to fraction form
    156,391.79/215,814.88 = 84,770.27/x
  3. Step 3: Cross multiply
    156,391.79x = 215,814.88 × 84,770.27
  4. Step 4: Simplify right side
    156,391.79x = 18,294,685,483.81
  5. Step 5: Solve for x
    x = 18,294,685,483.81/156,391.79
  6. Step 6: Final answer
    x = 116,979.84

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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.