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Finding the Fourth Proportional to 57,784.04, 86,528.06 and 39,990.05

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Solution

The fourth proportional to 57,784.04, 86,528.06 and 39,990.05 is: 59,882.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,784.04 : 86,528.06 = 39,990.05 : x
  2. Step 2: Convert to fraction form
    57,784.04/86,528.06 = 39,990.05/x
  3. Step 3: Cross multiply
    57,784.04x = 86,528.06 × 39,990.05
  4. Step 4: Simplify right side
    57,784.04x = 3,460,260,813.21
  5. Step 5: Solve for x
    x = 3,460,260,813.21/57,784.04
  6. Step 6: Final answer
    x = 59,882.64

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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.