Home / 136,915.89-188,941.85-76,487.40

Finding the Fourth Proportional to 136,915.89, 188,941.85 and 76,487.40

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Solution

The fourth proportional to 136,915.89, 188,941.85 and 76,487.40 is: 105,551.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,915.89 : 188,941.85 = 76,487.40 : x
  2. Step 2: Convert to fraction form
    136,915.89/188,941.85 = 76,487.40/x
  3. Step 3: Cross multiply
    136,915.89x = 188,941.85 × 76,487.40
  4. Step 4: Simplify right side
    136,915.89x = 14,451,670,475.25
  5. Step 5: Solve for x
    x = 14,451,670,475.25/136,915.89
  6. Step 6: Final answer
    x = 105,551.45

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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.