Home / 121,909.86-168,167.90-70,916.84

Finding the Fourth Proportional to 121,909.86, 168,167.90 and 70,916.84

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Solution

The fourth proportional to 121,909.86, 168,167.90 and 70,916.84 is: 97,825.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,909.86 : 168,167.90 = 70,916.84 : x
  2. Step 2: Convert to fraction form
    121,909.86/168,167.90 = 70,916.84/x
  3. Step 3: Cross multiply
    121,909.86x = 168,167.90 × 70,916.84
  4. Step 4: Simplify right side
    121,909.86x = 11,925,936,057.44
  5. Step 5: Solve for x
    x = 11,925,936,057.44/121,909.86
  6. Step 6: Final answer
    x = 97,825.85

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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.