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Finding the Fourth Proportional to 91,076.64, 136,614.96 and 28,752

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Solution

The fourth proportional to 91,076.64, 136,614.96 and 28,752 is: 43,128.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,076.64 : 136,614.96 = 28,752 : x
  2. Step 2: Convert to fraction form
    91,076.64/136,614.96 = 28,752/x
  3. Step 3: Cross multiply
    91,076.64x = 136,614.96 × 28,752
  4. Step 4: Simplify right side
    91,076.64x = 3,927,953,329.92
  5. Step 5: Solve for x
    x = 3,927,953,329.92/91,076.64
  6. Step 6: Final answer
    x = 43,128.00

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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.