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Finding the Fourth Proportional to 91,745.94, 137,424.51 and 69,312.18

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Solution

The fourth proportional to 91,745.94, 137,424.51 and 69,312.18 is: 103,821.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,745.94 : 137,424.51 = 69,312.18 : x
  2. Step 2: Convert to fraction form
    91,745.94/137,424.51 = 69,312.18/x
  3. Step 3: Cross multiply
    91,745.94x = 137,424.51 × 69,312.18
  4. Step 4: Simplify right side
    91,745.94x = 9,525,192,373.53
  5. Step 5: Solve for x
    x = 9,525,192,373.53/91,745.94
  6. Step 6: Final answer
    x = 103,821.40

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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.