Home / 100,339.04-138,456.60-57,911.60

Finding the Fourth Proportional to 100,339.04, 138,456.60 and 57,911.60

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Solution

The fourth proportional to 100,339.04, 138,456.60 and 57,911.60 is: 79,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,339.04 : 138,456.60 = 57,911.60 : x
  2. Step 2: Convert to fraction form
    100,339.04/138,456.60 = 57,911.60/x
  3. Step 3: Cross multiply
    100,339.04x = 138,456.60 × 57,911.60
  4. Step 4: Simplify right side
    100,339.04x = 8,018,243,236.56
  5. Step 5: Solve for x
    x = 8,018,243,236.56/100,339.04
  6. Step 6: Final answer
    x = 79,911.50

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1.5x scale

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.