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Finding the Fourth Proportional to 121,970.64, 168,260.58 and 76,625.76

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Solution

The fourth proportional to 121,970.64, 168,260.58 and 76,625.76 is: 105,706.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,970.64 : 168,260.58 = 76,625.76 : x
  2. Step 2: Convert to fraction form
    121,970.64/168,260.58 = 76,625.76/x
  3. Step 3: Cross multiply
    121,970.64x = 168,260.58 × 76,625.76
  4. Step 4: Simplify right side
    121,970.64x = 12,893,094,820.54
  5. Step 5: Solve for x
    x = 12,893,094,820.54/121,970.64
  6. Step 6: Final answer
    x = 105,706.54

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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.