Home / 129,421.10-178,599.42-74,980.69

Finding the Fourth Proportional to 129,421.10, 178,599.42 and 74,980.69

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Solution

The fourth proportional to 129,421.10, 178,599.42 and 74,980.69 is: 103,472.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,421.10 : 178,599.42 = 74,980.69 : x
  2. Step 2: Convert to fraction form
    129,421.10/178,599.42 = 74,980.69/x
  3. Step 3: Cross multiply
    129,421.10x = 178,599.42 × 74,980.69
  4. Step 4: Simplify right side
    129,421.10x = 13,391,507,745.20
  5. Step 5: Solve for x
    x = 13,391,507,745.20/129,421.10
  6. Step 6: Final answer
    x = 103,472.37

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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.