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Finding the Fourth Proportional to 70,931.80, 106,397.70 and 58,247.20

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Solution

The fourth proportional to 70,931.80, 106,397.70 and 58,247.20 is: 87,370.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.80 : 106,397.70 = 58,247.20 : x
  2. Step 2: Convert to fraction form
    70,931.80/106,397.70 = 58,247.20/x
  3. Step 3: Cross multiply
    70,931.80x = 106,397.70 × 58,247.20
  4. Step 4: Simplify right side
    70,931.80x = 6,197,368,111.44
  5. Step 5: Solve for x
    x = 6,197,368,111.44/70,931.80
  6. Step 6: Final answer
    x = 87,370.80

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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.