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Finding the Fourth Proportional to 99,662.20, 137,528.88 and 56,636.08

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Solution

The fourth proportional to 99,662.20, 137,528.88 and 56,636.08 is: 78,154.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,662.20 : 137,528.88 = 56,636.08 : x
  2. Step 2: Convert to fraction form
    99,662.20/137,528.88 = 56,636.08/x
  3. Step 3: Cross multiply
    99,662.20x = 137,528.88 × 56,636.08
  4. Step 4: Simplify right side
    99,662.20x = 7,789,096,649.99
  5. Step 5: Solve for x
    x = 7,789,096,649.99/99,662.20
  6. Step 6: Final answer
    x = 78,154.97

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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.