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Finding the Fourth Proportional to 145,191.69, 200,366.87 and 81,528.12

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Solution

The fourth proportional to 145,191.69, 200,366.87 and 81,528.12 is: 112,510.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,191.69 : 200,366.87 = 81,528.12 : x
  2. Step 2: Convert to fraction form
    145,191.69/200,366.87 = 81,528.12/x
  3. Step 3: Cross multiply
    145,191.69x = 200,366.87 × 81,528.12
  4. Step 4: Simplify right side
    145,191.69x = 16,335,533,813.74
  5. Step 5: Solve for x
    x = 16,335,533,813.74/145,191.69
  6. Step 6: Final answer
    x = 112,510.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.