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Finding the Fourth Proportional to 191,614, 287,544.02 and 128,505.40

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Solution

The fourth proportional to 191,614, 287,544.02 and 128,505.40 is: 192,840.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,614 : 287,544.02 = 128,505.40 : x
  2. Step 2: Convert to fraction form
    191,614/287,544.02 = 128,505.40/x
  3. Step 3: Cross multiply
    191,614x = 287,544.02 × 128,505.40
  4. Step 4: Simplify right side
    191,614x = 36,950,959,307.71
  5. Step 5: Solve for x
    x = 36,950,959,307.71/191,614
  6. Step 6: Final answer
    x = 192,840.60

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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.