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Finding the Fourth Proportional to 123,878.20, 185,865.90 and 45,000.40

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Solution

The fourth proportional to 123,878.20, 185,865.90 and 45,000.40 is: 67,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,878.20 : 185,865.90 = 45,000.40 : x
  2. Step 2: Convert to fraction form
    123,878.20/185,865.90 = 45,000.40/x
  3. Step 3: Cross multiply
    123,878.20x = 185,865.90 × 45,000.40
  4. Step 4: Simplify right side
    123,878.20x = 8,364,039,846.36
  5. Step 5: Solve for x
    x = 8,364,039,846.36/123,878.20
  6. Step 6: Final answer
    x = 67,518.25

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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.