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Finding the Fourth Proportional to 191,639.12, 287,476.45 and 65,236.90

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Solution

The fourth proportional to 191,639.12, 287,476.45 and 65,236.90 is: 97,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,639.12 : 287,476.45 = 65,236.90 : x
  2. Step 2: Convert to fraction form
    191,639.12/287,476.45 = 65,236.90/x
  3. Step 3: Cross multiply
    191,639.12x = 287,476.45 × 65,236.90
  4. Step 4: Simplify right side
    191,639.12x = 18,754,071,539.22
  5. Step 5: Solve for x
    x = 18,754,071,539.22/191,639.12
  6. Step 6: Final answer
    x = 97,861.40

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1.5x scale

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.