Home / 123,630.12-170,483.94-105,784.20

Finding the Fourth Proportional to 123,630.12, 170,483.94 and 105,784.20

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Solution

The fourth proportional to 123,630.12, 170,483.94 and 105,784.20 is: 145,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,630.12 : 170,483.94 = 105,784.20 : x
  2. Step 2: Convert to fraction form
    123,630.12/170,483.94 = 105,784.20/x
  3. Step 3: Cross multiply
    123,630.12x = 170,483.94 × 105,784.20
  4. Step 4: Simplify right side
    123,630.12x = 18,034,507,205.75
  5. Step 5: Solve for x
    x = 18,034,507,205.75/123,630.12
  6. Step 6: Final answer
    x = 145,874.70

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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.