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Finding the Fourth Proportional to 91,600.76, 137,420.73 and 28,419.51

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Solution

The fourth proportional to 91,600.76, 137,420.73 and 28,419.51 is: 42,635.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,600.76 : 137,420.73 = 28,419.51 : x
  2. Step 2: Convert to fraction form
    91,600.76/137,420.73 = 28,419.51/x
  3. Step 3: Cross multiply
    91,600.76x = 137,420.73 × 28,419.51
  4. Step 4: Simplify right side
    91,600.76x = 3,905,429,810.44
  5. Step 5: Solve for x
    x = 3,905,429,810.44/91,600.76
  6. Step 6: Final answer
    x = 42,635.34

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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.