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Finding the Fourth Proportional to 91,530.84, 137,308.95 and 28,355.97

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Solution

The fourth proportional to 91,530.84, 137,308.95 and 28,355.97 is: 42,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,530.84 : 137,308.95 = 28,355.97 : x
  2. Step 2: Convert to fraction form
    91,530.84/137,308.95 = 28,355.97/x
  3. Step 3: Cross multiply
    91,530.84x = 137,308.95 × 28,355.97
  4. Step 4: Simplify right side
    91,530.84x = 3,893,528,466.93
  5. Step 5: Solve for x
    x = 3,893,528,466.93/91,530.84
  6. Step 6: Final answer
    x = 42,537.89

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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.