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Finding the Fourth Proportional to 191,341.72, 287,000.91 and 71,375.50

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Solution

The fourth proportional to 191,341.72, 287,000.91 and 71,375.50 is: 107,058.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,341.72 : 287,000.91 = 71,375.50 : x
  2. Step 2: Convert to fraction form
    191,341.72/287,000.91 = 71,375.50/x
  3. Step 3: Cross multiply
    191,341.72x = 287,000.91 × 71,375.50
  4. Step 4: Simplify right side
    191,341.72x = 20,484,833,451.71
  5. Step 5: Solve for x
    x = 20,484,833,451.71/191,341.72
  6. Step 6: Final answer
    x = 107,058.90

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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.