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Finding the Fourth Proportional to 156,157.70, 215,484.64 and 91,620.20

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Solution

The fourth proportional to 156,157.70, 215,484.64 and 91,620.20 is: 126,428.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,157.70 : 215,484.64 = 91,620.20 : x
  2. Step 2: Convert to fraction form
    156,157.70/215,484.64 = 91,620.20/x
  3. Step 3: Cross multiply
    156,157.70x = 215,484.64 × 91,620.20
  4. Step 4: Simplify right side
    156,157.70x = 19,742,746,123.39
  5. Step 5: Solve for x
    x = 19,742,746,123.39/156,157.70
  6. Step 6: Final answer
    x = 126,428.26

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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.