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Finding the Fourth Proportional to 58,011.84, 86,829.48 and 31,320.72

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Solution

The fourth proportional to 58,011.84, 86,829.48 and 31,320.72 is: 46,879.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,011.84 : 86,829.48 = 31,320.72 : x
  2. Step 2: Convert to fraction form
    58,011.84/86,829.48 = 31,320.72/x
  3. Step 3: Cross multiply
    58,011.84x = 86,829.48 × 31,320.72
  4. Step 4: Simplify right side
    58,011.84x = 2,719,561,830.83
  5. Step 5: Solve for x
    x = 2,719,561,830.83/58,011.84
  6. Step 6: Final answer
    x = 46,879.43

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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.