Home / 216,968.28-299,416.68-121,479

Finding the Fourth Proportional to 216,968.28, 299,416.68 and 121,479

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Solution

The fourth proportional to 216,968.28, 299,416.68 and 121,479 is: 167,641.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,968.28 : 299,416.68 = 121,479 : x
  2. Step 2: Convert to fraction form
    216,968.28/299,416.68 = 121,479/x
  3. Step 3: Cross multiply
    216,968.28x = 299,416.68 × 121,479
  4. Step 4: Simplify right side
    216,968.28x = 36,372,838,869.72
  5. Step 5: Solve for x
    x = 36,372,838,869.72/216,968.28
  6. Step 6: Final answer
    x = 167,641.27

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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.