Home / 100,204.47-138,280.77-57,197.59

Finding the Fourth Proportional to 100,204.47, 138,280.77 and 57,197.59

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Solution

The fourth proportional to 100,204.47, 138,280.77 and 57,197.59 is: 78,931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,204.47 : 138,280.77 = 57,197.59 : x
  2. Step 2: Convert to fraction form
    100,204.47/138,280.77 = 57,197.59/x
  3. Step 3: Cross multiply
    100,204.47x = 138,280.77 × 57,197.59
  4. Step 4: Simplify right side
    100,204.47x = 7,909,326,847.06
  5. Step 5: Solve for x
    x = 7,909,326,847.06/100,204.47
  6. Step 6: Final answer
    x = 78,931.88

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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.