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Finding the Fourth Proportional to 82,666.80, 124,259.40 and 81,111.60

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Solution

The fourth proportional to 82,666.80, 124,259.40 and 81,111.60 is: 121,921.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,666.80 : 124,259.40 = 81,111.60 : x
  2. Step 2: Convert to fraction form
    82,666.80/124,259.40 = 81,111.60/x
  3. Step 3: Cross multiply
    82,666.80x = 124,259.40 × 81,111.60
  4. Step 4: Simplify right side
    82,666.80x = 10,078,878,749.04
  5. Step 5: Solve for x
    x = 10,078,878,749.04/82,666.80
  6. Step 6: Final answer
    x = 121,921.72

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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.