Home / 216,709.21-299,066.88-121,215.61

Finding the Fourth Proportional to 216,709.21, 299,066.88 and 121,215.61

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Solution

The fourth proportional to 216,709.21, 299,066.88 and 121,215.61 is: 167,282.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,709.21 : 299,066.88 = 121,215.61 : x
  2. Step 2: Convert to fraction form
    216,709.21/299,066.88 = 121,215.61/x
  3. Step 3: Cross multiply
    216,709.21x = 299,066.88 × 121,215.61
  4. Step 4: Simplify right side
    216,709.21x = 36,251,574,290.00
  5. Step 5: Solve for x
    x = 36,251,574,290.00/216,709.21
  6. Step 6: Final answer
    x = 167,282.11

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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.