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Finding the Fourth Proportional to 121,970.56, 168,338.46 and 76,654.72

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Solution

The fourth proportional to 121,970.56, 168,338.46 and 76,654.72 is: 105,795.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,970.56 : 168,338.46 = 76,654.72 : x
  2. Step 2: Convert to fraction form
    121,970.56/168,338.46 = 76,654.72/x
  3. Step 3: Cross multiply
    121,970.56x = 168,338.46 × 76,654.72
  4. Step 4: Simplify right side
    121,970.56x = 12,903,937,516.53
  5. Step 5: Solve for x
    x = 12,903,937,516.53/121,970.56
  6. Step 6: Final answer
    x = 105,795.51

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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.