Home / 138,355.60-190,931.10-80,984.50

Finding the Fourth Proportional to 138,355.60, 190,931.10 and 80,984.50

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Solution

The fourth proportional to 138,355.60, 190,931.10 and 80,984.50 is: 111,758.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,355.60 : 190,931.10 = 80,984.50 : x
  2. Step 2: Convert to fraction form
    138,355.60/190,931.10 = 80,984.50/x
  3. Step 3: Cross multiply
    138,355.60x = 190,931.10 × 80,984.50
  4. Step 4: Simplify right side
    138,355.60x = 15,462,459,667.95
  5. Step 5: Solve for x
    x = 15,462,459,667.95/138,355.60
  6. Step 6: Final answer
    x = 111,758.83

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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.