Home / 103,619.40-155,422.08-40,427.88

Finding the Fourth Proportional to 103,619.40, 155,422.08 and 40,427.88

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Solution

The fourth proportional to 103,619.40, 155,422.08 and 40,427.88 is: 60,639.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.40 : 155,422.08 = 40,427.88 : x
  2. Step 2: Convert to fraction form
    103,619.40/155,422.08 = 40,427.88/x
  3. Step 3: Cross multiply
    103,619.40x = 155,422.08 × 40,427.88
  4. Step 4: Simplify right side
    103,619.40x = 6,283,385,199.59
  5. Step 5: Solve for x
    x = 6,283,385,199.59/103,619.40
  6. Step 6: Final answer
    x = 60,639.08

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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.