Home / 100,062.11-138,126.80-67,840.86

Finding the Fourth Proportional to 100,062.11, 138,126.80 and 67,840.86

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Solution

The fourth proportional to 100,062.11, 138,126.80 and 67,840.86 is: 93,648.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,062.11 : 138,126.80 = 67,840.86 : x
  2. Step 2: Convert to fraction form
    100,062.11/138,126.80 = 67,840.86/x
  3. Step 3: Cross multiply
    100,062.11x = 138,126.80 × 67,840.86
  4. Step 4: Simplify right side
    100,062.11x = 9,370,641,588.63
  5. Step 5: Solve for x
    x = 9,370,641,588.63/100,062.11
  6. Step 6: Final answer
    x = 93,648.25

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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.