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Finding the Fourth Proportional to 91,710.06, 137,361.84 and 70,493.87

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Solution

The fourth proportional to 91,710.06, 137,361.84 and 70,493.87 is: 105,584.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,710.06 : 137,361.84 = 70,493.87 : x
  2. Step 2: Convert to fraction form
    91,710.06/137,361.84 = 70,493.87/x
  3. Step 3: Cross multiply
    91,710.06x = 137,361.84 × 70,493.87
  4. Step 4: Simplify right side
    91,710.06x = 9,683,167,005.11
  5. Step 5: Solve for x
    x = 9,683,167,005.11/91,710.06
  6. Step 6: Final answer
    x = 105,584.57

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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.