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Finding the Fourth Proportional to 191,939.34, 287,909.04 and 98,385.42

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Solution

The fourth proportional to 191,939.34, 287,909.04 and 98,385.42 is: 147,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,939.34 : 287,909.04 = 98,385.42 : x
  2. Step 2: Convert to fraction form
    191,939.34/287,909.04 = 98,385.42/x
  3. Step 3: Cross multiply
    191,939.34x = 287,909.04 × 98,385.42
  4. Step 4: Simplify right side
    191,939.34x = 28,326,051,822.20
  5. Step 5: Solve for x
    x = 28,326,051,822.20/191,939.34
  6. Step 6: Final answer
    x = 147,578.15

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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.