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Finding the Fourth Proportional to 122,630.21, 169,275.93 and 71,659.51

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Solution

The fourth proportional to 122,630.21, 169,275.93 and 71,659.51 is: 98,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,630.21 : 169,275.93 = 71,659.51 : x
  2. Step 2: Convert to fraction form
    122,630.21/169,275.93 = 71,659.51/x
  3. Step 3: Cross multiply
    122,630.21x = 169,275.93 × 71,659.51
  4. Step 4: Simplify right side
    122,630.21x = 12,130,229,775.40
  5. Step 5: Solve for x
    x = 12,130,229,775.40/122,630.21
  6. Step 6: Final answer
    x = 98,917.15

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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.