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Finding the Fourth Proportional to 91,750.94, 137,432 and 69,317.18

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Solution

The fourth proportional to 91,750.94, 137,432 and 69,317.18 is: 103,828.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,750.94 : 137,432 = 69,317.18 : x
  2. Step 2: Convert to fraction form
    91,750.94/137,432 = 69,317.18/x
  3. Step 3: Cross multiply
    91,750.94x = 137,432 × 69,317.18
  4. Step 4: Simplify right side
    91,750.94x = 9,526,398,681.76
  5. Step 5: Solve for x
    x = 9,526,398,681.76/91,750.94
  6. Step 6: Final answer
    x = 103,828.89

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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.