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Finding the Fourth Proportional to 103,873.79, 155,687.64 and 47,666.52

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Solution

The fourth proportional to 103,873.79, 155,687.64 and 47,666.52 is: 71,443.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,873.79 : 155,687.64 = 47,666.52 : x
  2. Step 2: Convert to fraction form
    103,873.79/155,687.64 = 47,666.52/x
  3. Step 3: Cross multiply
    103,873.79x = 155,687.64 × 47,666.52
  4. Step 4: Simplify right side
    103,873.79x = 7,421,088,005.81
  5. Step 5: Solve for x
    x = 7,421,088,005.81/103,873.79
  6. Step 6: Final answer
    x = 71,443.32

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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.