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Finding the Fourth Proportional to 91,787.68, 137,688.36 and 35,673.76

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Solution

The fourth proportional to 91,787.68, 137,688.36 and 35,673.76 is: 53,513.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,787.68 : 137,688.36 = 35,673.76 : x
  2. Step 2: Convert to fraction form
    91,787.68/137,688.36 = 35,673.76/x
  3. Step 3: Cross multiply
    91,787.68x = 137,688.36 × 35,673.76
  4. Step 4: Simplify right side
    91,787.68x = 4,911,861,509.43
  5. Step 5: Solve for x
    x = 4,911,861,509.43/91,787.68
  6. Step 6: Final answer
    x = 53,513.30

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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.