Home / 113,439.40-170,223.90-78,404.20

Finding the Fourth Proportional to 113,439.40, 170,223.90 and 78,404.20

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Solution

The fourth proportional to 113,439.40, 170,223.90 and 78,404.20 is: 117,651.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,439.40 : 170,223.90 = 78,404.20 : x
  2. Step 2: Convert to fraction form
    113,439.40/170,223.90 = 78,404.20/x
  3. Step 3: Cross multiply
    113,439.40x = 170,223.90 × 78,404.20
  4. Step 4: Simplify right side
    113,439.40x = 13,346,268,700.38
  5. Step 5: Solve for x
    x = 13,346,268,700.38/113,439.40
  6. Step 6: Final answer
    x = 117,651.09

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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.