Home / 103,534.28-142,679.64-89,189.60

Finding the Fourth Proportional to 103,534.28, 142,679.64 and 89,189.60

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Solution

The fourth proportional to 103,534.28, 142,679.64 and 89,189.60 is: 122,911.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,534.28 : 142,679.64 = 89,189.60 : x
  2. Step 2: Convert to fraction form
    103,534.28/142,679.64 = 89,189.60/x
  3. Step 3: Cross multiply
    103,534.28x = 142,679.64 × 89,189.60
  4. Step 4: Simplify right side
    103,534.28x = 12,725,540,019.74
  5. Step 5: Solve for x
    x = 12,725,540,019.74/103,534.28
  6. Step 6: Final answer
    x = 122,911.37

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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.