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Finding the Fourth Proportional to 58,658.20, 80,948.90 and 31,800.64

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Solution

The fourth proportional to 58,658.20, 80,948.90 and 31,800.64 is: 43,885.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,658.20 : 80,948.90 = 31,800.64 : x
  2. Step 2: Convert to fraction form
    58,658.20/80,948.90 = 31,800.64/x
  3. Step 3: Cross multiply
    58,658.20x = 80,948.90 × 31,800.64
  4. Step 4: Simplify right side
    58,658.20x = 2,574,226,827.30
  5. Step 5: Solve for x
    x = 2,574,226,827.30/58,658.20
  6. Step 6: Final answer
    x = 43,885.20

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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.