Home / 103,990.21-143,528.70-65,725.41

Finding the Fourth Proportional to 103,990.21, 143,528.70 and 65,725.41

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Solution

The fourth proportional to 103,990.21, 143,528.70 and 65,725.41 is: 90,715.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,990.21 : 143,528.70 = 65,725.41 : x
  2. Step 2: Convert to fraction form
    103,990.21/143,528.70 = 65,725.41/x
  3. Step 3: Cross multiply
    103,990.21x = 143,528.70 × 65,725.41
  4. Step 4: Simplify right side
    103,990.21x = 9,433,482,654.27
  5. Step 5: Solve for x
    x = 9,433,482,654.27/103,990.21
  6. Step 6: Final answer
    x = 90,715.10

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1.5x scale

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.