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Finding the Fourth Proportional to 191,435.72, 286,963.35 and 91,479.20

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Solution

The fourth proportional to 191,435.72, 286,963.35 and 91,479.20 is: 137,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,435.72 : 286,963.35 = 91,479.20 : x
  2. Step 2: Convert to fraction form
    191,435.72/286,963.35 = 91,479.20/x
  3. Step 3: Cross multiply
    191,435.72x = 286,963.35 × 91,479.20
  4. Step 4: Simplify right side
    191,435.72x = 26,251,176,252.50
  5. Step 5: Solve for x
    x = 26,251,176,252.50/191,435.72
  6. Step 6: Final answer
    x = 137,127.89

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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.