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Finding the Fourth Proportional to 70,386.52, 105,685.20 and 60,928.20

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Solution

The fourth proportional to 70,386.52, 105,685.20 and 60,928.20 is: 91,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,386.52 : 105,685.20 = 60,928.20 : x
  2. Step 2: Convert to fraction form
    70,386.52/105,685.20 = 60,928.20/x
  3. Step 3: Cross multiply
    70,386.52x = 105,685.20 × 60,928.20
  4. Step 4: Simplify right side
    70,386.52x = 6,439,209,002.64
  5. Step 5: Solve for x
    x = 6,439,209,002.64/70,386.52
  6. Step 6: Final answer
    x = 91,483.55

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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.