Home / 156,946.30-216,660.29-100,390.48

Finding the Fourth Proportional to 156,946.30, 216,660.29 and 100,390.48

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Solution

The fourth proportional to 156,946.30, 216,660.29 and 100,390.48 is: 138,586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,946.30 : 216,660.29 = 100,390.48 : x
  2. Step 2: Convert to fraction form
    156,946.30/216,660.29 = 100,390.48/x
  3. Step 3: Cross multiply
    156,946.30x = 216,660.29 × 100,390.48
  4. Step 4: Simplify right side
    156,946.30x = 21,750,629,466.44
  5. Step 5: Solve for x
    x = 21,750,629,466.44/156,946.30
  6. Step 6: Final answer
    x = 138,586.45

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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.