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Finding the Fourth Proportional to 191,104.30, 286,656.45 and 86,128.30

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Solution

The fourth proportional to 191,104.30, 286,656.45 and 86,128.30 is: 129,192.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,104.30 : 286,656.45 = 86,128.30 : x
  2. Step 2: Convert to fraction form
    191,104.30/286,656.45 = 86,128.30/x
  3. Step 3: Cross multiply
    191,104.30x = 286,656.45 × 86,128.30
  4. Step 4: Simplify right side
    191,104.30x = 24,689,232,722.54
  5. Step 5: Solve for x
    x = 24,689,232,722.54/191,104.30
  6. Step 6: Final answer
    x = 129,192.45

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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.