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Finding the Fourth Proportional to 91,806.90, 137,710.35 and 91,223.70

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Solution

The fourth proportional to 91,806.90, 137,710.35 and 91,223.70 is: 136,835.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806.90 : 137,710.35 = 91,223.70 : x
  2. Step 2: Convert to fraction form
    91,806.90/137,710.35 = 91,223.70/x
  3. Step 3: Cross multiply
    91,806.90x = 137,710.35 × 91,223.70
  4. Step 4: Simplify right side
    91,806.90x = 12,562,447,655.30
  5. Step 5: Solve for x
    x = 12,562,447,655.30/91,806.90
  6. Step 6: Final answer
    x = 136,835.55

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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.