Home / 103,915.20-155,945.70-66,566.10

Finding the Fourth Proportional to 103,915.20, 155,945.70 and 66,566.10

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Solution

The fourth proportional to 103,915.20, 155,945.70 and 66,566.10 is: 99,895.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,915.20 : 155,945.70 = 66,566.10 : x
  2. Step 2: Convert to fraction form
    103,915.20/155,945.70 = 66,566.10/x
  3. Step 3: Cross multiply
    103,915.20x = 155,945.70 × 66,566.10
  4. Step 4: Simplify right side
    103,915.20x = 10,380,697,060.77
  5. Step 5: Solve for x
    x = 10,380,697,060.77/103,915.20
  6. Step 6: Final answer
    x = 99,895.85

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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.