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Finding the Fourth Proportional to 191,643.03, 287,464.55 and 86,492.07

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Solution

The fourth proportional to 191,643.03, 287,464.55 and 86,492.07 is: 129,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,643.03 : 287,464.55 = 86,492.07 : x
  2. Step 2: Convert to fraction form
    191,643.03/287,464.55 = 86,492.07/x
  3. Step 3: Cross multiply
    191,643.03x = 287,464.55 × 86,492.07
  4. Step 4: Simplify right side
    191,643.03x = 24,863,403,548.66
  5. Step 5: Solve for x
    x = 24,863,403,548.66/191,643.03
  6. Step 6: Final answer
    x = 129,738.11

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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.