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Finding the Fourth Proportional to 117,457.60, 162,060.80 and 69,721.60

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Solution

The fourth proportional to 117,457.60, 162,060.80 and 69,721.60 is: 96,197.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,457.60 : 162,060.80 = 69,721.60 : x
  2. Step 2: Convert to fraction form
    117,457.60/162,060.80 = 69,721.60/x
  3. Step 3: Cross multiply
    117,457.60x = 162,060.80 × 69,721.60
  4. Step 4: Simplify right side
    117,457.60x = 11,299,138,273.28
  5. Step 5: Solve for x
    x = 11,299,138,273.28/117,457.60
  6. Step 6: Final answer
    x = 96,197.59

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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.