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Finding the Fourth Proportional to 216,685.67, 299,041.88 and 121,223.12

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Solution

The fourth proportional to 216,685.67, 299,041.88 and 121,223.12 is: 167,296.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,685.67 : 299,041.88 = 121,223.12 : x
  2. Step 2: Convert to fraction form
    216,685.67/299,041.88 = 121,223.12/x
  3. Step 3: Cross multiply
    216,685.67x = 299,041.88 × 121,223.12
  4. Step 4: Simplify right side
    216,685.67x = 36,250,787,602.94
  5. Step 5: Solve for x
    x = 36,250,787,602.94/216,685.67
  6. Step 6: Final answer
    x = 167,296.66

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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.