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Finding the Fourth Proportional to 191,612.28, 287,420.58 and 73,289.64

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Solution

The fourth proportional to 191,612.28, 287,420.58 and 73,289.64 is: 109,935.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,612.28 : 287,420.58 = 73,289.64 : x
  2. Step 2: Convert to fraction form
    191,612.28/287,420.58 = 73,289.64/x
  3. Step 3: Cross multiply
    191,612.28x = 287,420.58 × 73,289.64
  4. Step 4: Simplify right side
    191,612.28x = 21,064,950,836.79
  5. Step 5: Solve for x
    x = 21,064,950,836.79/191,612.28
  6. Step 6: Final answer
    x = 109,935.29

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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.