Home / 127,005.05-190,133.87-84,780.40

Finding the Fourth Proportional to 127,005.05, 190,133.87 and 84,780.40

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Solution

The fourth proportional to 127,005.05, 190,133.87 and 84,780.40 is: 126,921.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,005.05 : 190,133.87 = 84,780.40 : x
  2. Step 2: Convert to fraction form
    127,005.05/190,133.87 = 84,780.40/x
  3. Step 3: Cross multiply
    127,005.05x = 190,133.87 × 84,780.40
  4. Step 4: Simplify right side
    127,005.05x = 16,119,625,128.25
  5. Step 5: Solve for x
    x = 16,119,625,128.25/127,005.05
  6. Step 6: Final answer
    x = 126,921.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.