Home / 91,728.63-137,632.49-49,638.30

Finding the Fourth Proportional to 91,728.63, 137,632.49 and 49,638.30

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Solution

The fourth proportional to 91,728.63, 137,632.49 and 49,638.30 is: 74,478.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,728.63 : 137,632.49 = 49,638.30 : x
  2. Step 2: Convert to fraction form
    91,728.63/137,632.49 = 49,638.30/x
  3. Step 3: Cross multiply
    91,728.63x = 137,632.49 × 49,638.30
  4. Step 4: Simplify right side
    91,728.63x = 6,831,842,580.18
  5. Step 5: Solve for x
    x = 6,831,842,580.18/91,728.63
  6. Step 6: Final answer
    x = 74,478.85

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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.