Home / 201,521.55-278,139.51-115,538.30

Finding the Fourth Proportional to 201,521.55, 278,139.51 and 115,538.30

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Solution

The fourth proportional to 201,521.55, 278,139.51 and 115,538.30 is: 159,465.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,521.55 : 278,139.51 = 115,538.30 : x
  2. Step 2: Convert to fraction form
    201,521.55/278,139.51 = 115,538.30/x
  3. Step 3: Cross multiply
    201,521.55x = 278,139.51 × 115,538.30
  4. Step 4: Simplify right side
    201,521.55x = 32,135,766,148.23
  5. Step 5: Solve for x
    x = 32,135,766,148.23/201,521.55
  6. Step 6: Final answer
    x = 159,465.66

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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.