Home / 191,966.40-287,863.20-86,731.20

Finding the Fourth Proportional to 191,966.40, 287,863.20 and 86,731.20

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Solution

The fourth proportional to 191,966.40, 287,863.20 and 86,731.20 is: 130,057.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,966.40 : 287,863.20 = 86,731.20 : x
  2. Step 2: Convert to fraction form
    191,966.40/287,863.20 = 86,731.20/x
  3. Step 3: Cross multiply
    191,966.40x = 287,863.20 × 86,731.20
  4. Step 4: Simplify right side
    191,966.40x = 24,966,720,771.84
  5. Step 5: Solve for x
    x = 24,966,720,771.84/191,966.40
  6. Step 6: Final answer
    x = 130,057.76

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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.