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Finding the Fourth Proportional to 121,904.87, 168,160.99 and 70,911.86

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Solution

The fourth proportional to 121,904.87, 168,160.99 and 70,911.86 is: 97,818.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,904.87 : 168,160.99 = 70,911.86 : x
  2. Step 2: Convert to fraction form
    121,904.87/168,160.99 = 70,911.86/x
  3. Step 3: Cross multiply
    121,904.87x = 168,160.99 × 70,911.86
  4. Step 4: Simplify right side
    121,904.87x = 11,924,607,562.26
  5. Step 5: Solve for x
    x = 11,924,607,562.26/121,904.87
  6. Step 6: Final answer
    x = 97,818.96

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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.