Home / 138,583.60-207,826.80-72,001.60

Finding the Fourth Proportional to 138,583.60, 207,826.80 and 72,001.60

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Solution

The fourth proportional to 138,583.60, 207,826.80 and 72,001.60 is: 107,977.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,583.60 : 207,826.80 = 72,001.60 : x
  2. Step 2: Convert to fraction form
    138,583.60/207,826.80 = 72,001.60/x
  3. Step 3: Cross multiply
    138,583.60x = 207,826.80 × 72,001.60
  4. Step 4: Simplify right side
    138,583.60x = 14,963,862,122.88
  5. Step 5: Solve for x
    x = 14,963,862,122.88/138,583.60
  6. Step 6: Final answer
    x = 107,977.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.