Home / 82,428.40-123,772.20-47,436.40

Finding the Fourth Proportional to 82,428.40, 123,772.20 and 47,436.40

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Solution

The fourth proportional to 82,428.40, 123,772.20 and 47,436.40 is: 71,229.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,428.40 : 123,772.20 = 47,436.40 : x
  2. Step 2: Convert to fraction form
    82,428.40/123,772.20 = 47,436.40/x
  3. Step 3: Cross multiply
    82,428.40x = 123,772.20 × 47,436.40
  4. Step 4: Simplify right side
    82,428.40x = 5,871,307,588.08
  5. Step 5: Solve for x
    x = 5,871,307,588.08/82,428.40
  6. Step 6: Final answer
    x = 71,229.18

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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.