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Finding the Fourth Proportional to 81,387.80, 112,302.18 and 45,579.32

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Solution

The fourth proportional to 81,387.80, 112,302.18 and 45,579.32 is: 62,892.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,387.80 : 112,302.18 = 45,579.32 : x
  2. Step 2: Convert to fraction form
    81,387.80/112,302.18 = 45,579.32/x
  3. Step 3: Cross multiply
    81,387.80x = 112,302.18 × 45,579.32
  4. Step 4: Simplify right side
    81,387.80x = 5,118,656,998.92
  5. Step 5: Solve for x
    x = 5,118,656,998.92/81,387.80
  6. Step 6: Final answer
    x = 62,892.19

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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.