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Finding the Fourth Proportional to 123,543.70, 185,315.55 and 81,480.40

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Solution

The fourth proportional to 123,543.70, 185,315.55 and 81,480.40 is: 122,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,543.70 : 185,315.55 = 81,480.40 : x
  2. Step 2: Convert to fraction form
    123,543.70/185,315.55 = 81,480.40/x
  3. Step 3: Cross multiply
    123,543.70x = 185,315.55 × 81,480.40
  4. Step 4: Simplify right side
    123,543.70x = 15,099,585,140.22
  5. Step 5: Solve for x
    x = 15,099,585,140.22/123,543.70
  6. Step 6: Final answer
    x = 122,220.60

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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.