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Finding the Fourth Proportional to 191,133.88, 287,812 and 141,565.72

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Solution

The fourth proportional to 191,133.88, 287,812 and 141,565.72 is: 213,171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,133.88 : 287,812 = 141,565.72 : x
  2. Step 2: Convert to fraction form
    191,133.88/287,812 = 141,565.72/x
  3. Step 3: Cross multiply
    191,133.88x = 287,812 × 141,565.72
  4. Step 4: Simplify right side
    191,133.88x = 40,744,313,004.64
  5. Step 5: Solve for x
    x = 40,744,313,004.64/191,133.88
  6. Step 6: Final answer
    x = 213,171.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.