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Finding the Fourth Proportional to 191,539.60, 287,309.40 and 121,728.40

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Solution

The fourth proportional to 191,539.60, 287,309.40 and 121,728.40 is: 182,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,539.60 : 287,309.40 = 121,728.40 : x
  2. Step 2: Convert to fraction form
    191,539.60/287,309.40 = 121,728.40/x
  3. Step 3: Cross multiply
    191,539.60x = 287,309.40 × 121,728.40
  4. Step 4: Simplify right side
    191,539.60x = 34,973,713,566.96
  5. Step 5: Solve for x
    x = 34,973,713,566.96/191,539.60
  6. Step 6: Final answer
    x = 182,592.60

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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.