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Finding the Fourth Proportional to 81,209.08, 112,071 and 45,400.60

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Solution

The fourth proportional to 81,209.08, 112,071 and 45,400.60 is: 62,654.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,209.08 : 112,071 = 45,400.60 : x
  2. Step 2: Convert to fraction form
    81,209.08/112,071 = 45,400.60/x
  3. Step 3: Cross multiply
    81,209.08x = 112,071 × 45,400.60
  4. Step 4: Simplify right side
    81,209.08x = 5,088,090,642.60
  5. Step 5: Solve for x
    x = 5,088,090,642.60/81,209.08
  6. Step 6: Final answer
    x = 62,654.21

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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.