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Finding the Fourth Proportional to 66,543.59, 99,820.29 and 19,156.77

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Solution

The fourth proportional to 66,543.59, 99,820.29 and 19,156.77 is: 28,736.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,543.59 : 99,820.29 = 19,156.77 : x
  2. Step 2: Convert to fraction form
    66,543.59/99,820.29 = 19,156.77/x
  3. Step 3: Cross multiply
    66,543.59x = 99,820.29 × 19,156.77
  4. Step 4: Simplify right side
    66,543.59x = 1,912,234,336.86
  5. Step 5: Solve for x
    x = 1,912,234,336.86/66,543.59
  6. Step 6: Final answer
    x = 28,736.57

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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.