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Finding the Fourth Proportional to 191,520.80, 287,108.40 and 124,992.80

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Solution

The fourth proportional to 191,520.80, 287,108.40 and 124,992.80 is: 187,376.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,520.80 : 287,108.40 = 124,992.80 : x
  2. Step 2: Convert to fraction form
    191,520.80/287,108.40 = 124,992.80/x
  3. Step 3: Cross multiply
    191,520.80x = 287,108.40 × 124,992.80
  4. Step 4: Simplify right side
    191,520.80x = 35,886,482,819.52
  5. Step 5: Solve for x
    x = 35,886,482,819.52/191,520.80
  6. Step 6: Final answer
    x = 187,376.43

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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.