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Finding the Fourth Proportional to 191,647.52, 287,485.13 and 77,740.63

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Solution

The fourth proportional to 191,647.52, 287,485.13 and 77,740.63 is: 116,616.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,647.52 : 287,485.13 = 77,740.63 : x
  2. Step 2: Convert to fraction form
    191,647.52/287,485.13 = 77,740.63/x
  3. Step 3: Cross multiply
    191,647.52x = 287,485.13 × 77,740.63
  4. Step 4: Simplify right side
    191,647.52x = 22,349,274,451.71
  5. Step 5: Solve for x
    x = 22,349,274,451.71/191,647.52
  6. Step 6: Final answer
    x = 116,616.56

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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.