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Finding the Fourth Proportional to 216,898.11, 299,319.35 and 121,404.83

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Solution

The fourth proportional to 216,898.11, 299,319.35 and 121,404.83 is: 167,538.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,898.11 : 299,319.35 = 121,404.83 : x
  2. Step 2: Convert to fraction form
    216,898.11/299,319.35 = 121,404.83/x
  3. Step 3: Cross multiply
    216,898.11x = 299,319.35 × 121,404.83
  4. Step 4: Simplify right side
    216,898.11x = 36,338,812,698.84
  5. Step 5: Solve for x
    x = 36,338,812,698.84/216,898.11
  6. Step 6: Final answer
    x = 167,538.63

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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.