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Finding the Fourth Proportional to 74,931.90, 112,300.96 and 56,063.90

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Solution

The fourth proportional to 74,931.90, 112,300.96 and 56,063.90 is: 84,023.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,931.90 : 112,300.96 = 56,063.90 : x
  2. Step 2: Convert to fraction form
    74,931.90/112,300.96 = 56,063.90/x
  3. Step 3: Cross multiply
    74,931.90x = 112,300.96 × 56,063.90
  4. Step 4: Simplify right side
    74,931.90x = 6,296,029,405.36
  5. Step 5: Solve for x
    x = 6,296,029,405.36/74,931.90
  6. Step 6: Final answer
    x = 84,023.35

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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.