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Finding the Fourth Proportional to 81,783.68, 112,855.88 and 45,979.25

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Solution

The fourth proportional to 81,783.68, 112,855.88 and 45,979.25 is: 63,448.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,783.68 : 112,855.88 = 45,979.25 : x
  2. Step 2: Convert to fraction form
    81,783.68/112,855.88 = 45,979.25/x
  3. Step 3: Cross multiply
    81,783.68x = 112,855.88 × 45,979.25
  4. Step 4: Simplify right side
    81,783.68x = 5,189,028,271.16
  5. Step 5: Solve for x
    x = 5,189,028,271.16/81,783.68
  6. Step 6: Final answer
    x = 63,448.22

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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.