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Finding the Fourth Proportional to 124,519.68, 171,784.80 and 86,815.80

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Solution

The fourth proportional to 124,519.68, 171,784.80 and 86,815.80 is: 119,769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,519.68 : 171,784.80 = 86,815.80 : x
  2. Step 2: Convert to fraction form
    124,519.68/171,784.80 = 86,815.80/x
  3. Step 3: Cross multiply
    124,519.68x = 171,784.80 × 86,815.80
  4. Step 4: Simplify right side
    124,519.68x = 14,913,634,839.84
  5. Step 5: Solve for x
    x = 14,913,634,839.84/124,519.68
  6. Step 6: Final answer
    x = 119,769.30

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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.