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Finding the Fourth Proportional to 60,578.30, 90,867.45 and 56,690.30

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Solution

The fourth proportional to 60,578.30, 90,867.45 and 56,690.30 is: 85,035.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,578.30 : 90,867.45 = 56,690.30 : x
  2. Step 2: Convert to fraction form
    60,578.30/90,867.45 = 56,690.30/x
  3. Step 3: Cross multiply
    60,578.30x = 90,867.45 × 56,690.30
  4. Step 4: Simplify right side
    60,578.30x = 5,151,303,000.74
  5. Step 5: Solve for x
    x = 5,151,303,000.74/60,578.30
  6. Step 6: Final answer
    x = 85,035.45

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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.