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Finding the Fourth Proportional to 60,986.75, 91,385.65 and 42,303.11

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Solution

The fourth proportional to 60,986.75, 91,385.65 and 42,303.11 is: 63,389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,986.75 : 91,385.65 = 42,303.11 : x
  2. Step 2: Convert to fraction form
    60,986.75/91,385.65 = 42,303.11/x
  3. Step 3: Cross multiply
    60,986.75x = 91,385.65 × 42,303.11
  4. Step 4: Simplify right side
    60,986.75x = 3,865,897,204.37
  5. Step 5: Solve for x
    x = 3,865,897,204.37/60,986.75
  6. Step 6: Final answer
    x = 63,389.13

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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.