Home / 103,620.40-155,423.58-40,428.88

Finding the Fourth Proportional to 103,620.40, 155,423.58 and 40,428.88

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Solution

The fourth proportional to 103,620.40, 155,423.58 and 40,428.88 is: 60,640.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,620.40 : 155,423.58 = 40,428.88 : x
  2. Step 2: Convert to fraction form
    103,620.40/155,423.58 = 40,428.88/x
  3. Step 3: Cross multiply
    103,620.40x = 155,423.58 × 40,428.88
  4. Step 4: Simplify right side
    103,620.40x = 6,283,601,264.99
  5. Step 5: Solve for x
    x = 6,283,601,264.99/103,620.40
  6. Step 6: Final answer
    x = 60,640.58

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1.5x scale

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.