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Finding the Fourth Proportional to 216,774.78, 299,154.51 and 121,287.66

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Solution

The fourth proportional to 216,774.78, 299,154.51 and 121,287.66 is: 167,379.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,774.78 : 299,154.51 = 121,287.66 : x
  2. Step 2: Convert to fraction form
    216,774.78/299,154.51 = 121,287.66/x
  3. Step 3: Cross multiply
    216,774.78x = 299,154.51 × 121,287.66
  4. Step 4: Simplify right side
    216,774.78x = 36,283,750,496.35
  5. Step 5: Solve for x
    x = 36,283,750,496.35/216,774.78
  6. Step 6: Final answer
    x = 167,379.94

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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.