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Finding the Fourth Proportional to 216,715.50, 299,080.65 and 121,228.62

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Solution

The fourth proportional to 216,715.50, 299,080.65 and 121,228.62 is: 167,302.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,715.50 : 299,080.65 = 121,228.62 : x
  2. Step 2: Convert to fraction form
    216,715.50/299,080.65 = 121,228.62/x
  3. Step 3: Cross multiply
    216,715.50x = 299,080.65 × 121,228.62
  4. Step 4: Simplify right side
    216,715.50x = 36,257,134,468.20
  5. Step 5: Solve for x
    x = 36,257,134,468.20/216,715.50
  6. Step 6: Final answer
    x = 167,302.91

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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.