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Finding the Fourth Proportional to 91,916.80, 137,875.20 and 73,484.80

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Solution

The fourth proportional to 91,916.80, 137,875.20 and 73,484.80 is: 110,227.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,916.80 : 137,875.20 = 73,484.80 : x
  2. Step 2: Convert to fraction form
    91,916.80/137,875.20 = 73,484.80/x
  3. Step 3: Cross multiply
    91,916.80x = 137,875.20 × 73,484.80
  4. Step 4: Simplify right side
    91,916.80x = 10,131,731,496.96
  5. Step 5: Solve for x
    x = 10,131,731,496.96/91,916.80
  6. Step 6: Final answer
    x = 110,227.20

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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.