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Finding the Fourth Proportional to 91,600.98, 137,421.08 and 28,419.74

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Solution

The fourth proportional to 91,600.98, 137,421.08 and 28,419.74 is: 42,635.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,600.98 : 137,421.08 = 28,419.74 : x
  2. Step 2: Convert to fraction form
    91,600.98/137,421.08 = 28,419.74/x
  3. Step 3: Cross multiply
    91,600.98x = 137,421.08 × 28,419.74
  4. Step 4: Simplify right side
    91,600.98x = 3,905,471,364.12
  5. Step 5: Solve for x
    x = 3,905,471,364.12/91,600.98
  6. Step 6: Final answer
    x = 42,635.69

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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.