Home / 123,139.20-184,708.80-70,505.40

Finding the Fourth Proportional to 123,139.20, 184,708.80 and 70,505.40

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Solution

The fourth proportional to 123,139.20, 184,708.80 and 70,505.40 is: 105,758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,139.20 : 184,708.80 = 70,505.40 : x
  2. Step 2: Convert to fraction form
    123,139.20/184,708.80 = 70,505.40/x
  3. Step 3: Cross multiply
    123,139.20x = 184,708.80 × 70,505.40
  4. Step 4: Simplify right side
    123,139.20x = 13,022,967,827.52
  5. Step 5: Solve for x
    x = 13,022,967,827.52/123,139.20
  6. Step 6: Final answer
    x = 105,758.10

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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.