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Finding the Fourth Proportional to 196,646.40, 295,123.20 and 91,478.40

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Solution

The fourth proportional to 196,646.40, 295,123.20 and 91,478.40 is: 137,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,646.40 : 295,123.20 = 91,478.40 : x
  2. Step 2: Convert to fraction form
    196,646.40/295,123.20 = 91,478.40/x
  3. Step 3: Cross multiply
    196,646.40x = 295,123.20 × 91,478.40
  4. Step 4: Simplify right side
    196,646.40x = 26,997,398,138.88
  5. Step 5: Solve for x
    x = 26,997,398,138.88/196,646.40
  6. Step 6: Final answer
    x = 137,289.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.