Home / 138,147.58-190,666.56-87,188.10

Finding the Fourth Proportional to 138,147.58, 190,666.56 and 87,188.10

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Solution

The fourth proportional to 138,147.58, 190,666.56 and 87,188.10 is: 120,334.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,147.58 : 190,666.56 = 87,188.10 : x
  2. Step 2: Convert to fraction form
    138,147.58/190,666.56 = 87,188.10/x
  3. Step 3: Cross multiply
    138,147.58x = 190,666.56 × 87,188.10
  4. Step 4: Simplify right side
    138,147.58x = 16,623,854,221.46
  5. Step 5: Solve for x
    x = 16,623,854,221.46/138,147.58
  6. Step 6: Final answer
    x = 120,334.03

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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.