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Finding the Fourth Proportional to 88,136, 121,627.68 and 48,392

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Solution

The fourth proportional to 88,136, 121,627.68 and 48,392 is: 66,780.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,136 : 121,627.68 = 48,392 : x
  2. Step 2: Convert to fraction form
    88,136/121,627.68 = 48,392/x
  3. Step 3: Cross multiply
    88,136x = 121,627.68 × 48,392
  4. Step 4: Simplify right side
    88,136x = 5,885,806,690.56
  5. Step 5: Solve for x
    x = 5,885,806,690.56/88,136
  6. Step 6: Final answer
    x = 66,780.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.