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Finding the Fourth Proportional to 85,798.62, 128,700.65 and 29,641.94

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Solution

The fourth proportional to 85,798.62, 128,700.65 and 29,641.94 is: 44,463.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,798.62 : 128,700.65 = 29,641.94 : x
  2. Step 2: Convert to fraction form
    85,798.62/128,700.65 = 29,641.94/x
  3. Step 3: Cross multiply
    85,798.62x = 128,700.65 × 29,641.94
  4. Step 4: Simplify right side
    85,798.62x = 3,814,936,153.55
  5. Step 5: Solve for x
    x = 3,814,936,153.55/85,798.62
  6. Step 6: Final answer
    x = 44,463.84

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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.