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Finding the Fourth Proportional to 191,680.45, 264,520.80 and 105,642.50

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Solution

The fourth proportional to 191,680.45, 264,520.80 and 105,642.50 is: 145,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,680.45 : 264,520.80 = 105,642.50 : x
  2. Step 2: Convert to fraction form
    191,680.45/264,520.80 = 105,642.50/x
  3. Step 3: Cross multiply
    191,680.45x = 264,520.80 × 105,642.50
  4. Step 4: Simplify right side
    191,680.45x = 27,944,637,291.40
  5. Step 5: Solve for x
    x = 27,944,637,291.40/191,680.45
  6. Step 6: Final answer
    x = 145,787.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.