Home / 211,051.20-291,278.40-120,386.40

Finding the Fourth Proportional to 211,051.20, 291,278.40 and 120,386.40

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Solution

The fourth proportional to 211,051.20, 291,278.40 and 120,386.40 is: 166,149.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,051.20 : 291,278.40 = 120,386.40 : x
  2. Step 2: Convert to fraction form
    211,051.20/291,278.40 = 120,386.40/x
  3. Step 3: Cross multiply
    211,051.20x = 291,278.40 × 120,386.40
  4. Step 4: Simplify right side
    211,051.20x = 35,065,957,973.76
  5. Step 5: Solve for x
    x = 35,065,957,973.76/211,051.20
  6. Step 6: Final answer
    x = 166,149.06

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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.