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Finding the Fourth Proportional to 103,543.56, 155,315.57 and 28,663.92

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Solution

The fourth proportional to 103,543.56, 155,315.57 and 28,663.92 is: 42,995.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,543.56 : 155,315.57 = 28,663.92 : x
  2. Step 2: Convert to fraction form
    103,543.56/155,315.57 = 28,663.92/x
  3. Step 3: Cross multiply
    103,543.56x = 155,315.57 × 28,663.92
  4. Step 4: Simplify right side
    103,543.56x = 4,451,952,929.91
  5. Step 5: Solve for x
    x = 4,451,952,929.91/103,543.56
  6. Step 6: Final answer
    x = 42,995.94

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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.