Home / 99,731.02-137,641.60-57,297.76

Finding the Fourth Proportional to 99,731.02, 137,641.60 and 57,297.76

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Solution

The fourth proportional to 99,731.02, 137,641.60 and 57,297.76 is: 79,078.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,731.02 : 137,641.60 = 57,297.76 : x
  2. Step 2: Convert to fraction form
    99,731.02/137,641.60 = 57,297.76/x
  3. Step 3: Cross multiply
    99,731.02x = 137,641.60 × 57,297.76
  4. Step 4: Simplify right side
    99,731.02x = 7,886,555,362.82
  5. Step 5: Solve for x
    x = 7,886,555,362.82/99,731.02
  6. Step 6: Final answer
    x = 79,078.26

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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.