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Finding the Fourth Proportional to 82,190.40, 123,216.48 and 42,662.40

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Solution

The fourth proportional to 82,190.40, 123,216.48 and 42,662.40 is: 63,957.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,190.40 : 123,216.48 = 42,662.40 : x
  2. Step 2: Convert to fraction form
    82,190.40/123,216.48 = 42,662.40/x
  3. Step 3: Cross multiply
    82,190.40x = 123,216.48 × 42,662.40
  4. Step 4: Simplify right side
    82,190.40x = 5,256,710,756.35
  5. Step 5: Solve for x
    x = 5,256,710,756.35/82,190.40
  6. Step 6: Final answer
    x = 63,957.72

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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.