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Finding the Fourth Proportional to 91,881.60, 137,835.36 and 45,136.32

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Solution

The fourth proportional to 91,881.60, 137,835.36 and 45,136.32 is: 67,710.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,881.60 : 137,835.36 = 45,136.32 : x
  2. Step 2: Convert to fraction form
    91,881.60/137,835.36 = 45,136.32/x
  3. Step 3: Cross multiply
    91,881.60x = 137,835.36 × 45,136.32
  4. Step 4: Simplify right side
    91,881.60x = 6,221,380,916.28
  5. Step 5: Solve for x
    x = 6,221,380,916.28/91,881.60
  6. Step 6: Final answer
    x = 67,710.85

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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.