Home / 127,139.42-190,703.51-38,390.20

Finding the Fourth Proportional to 127,139.42, 190,703.51 and 38,390.20

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Solution

The fourth proportional to 127,139.42, 190,703.51 and 38,390.20 is: 57,583.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,139.42 : 190,703.51 = 38,390.20 : x
  2. Step 2: Convert to fraction form
    127,139.42/190,703.51 = 38,390.20/x
  3. Step 3: Cross multiply
    127,139.42x = 190,703.51 × 38,390.20
  4. Step 4: Simplify right side
    127,139.42x = 7,321,146,653.51
  5. Step 5: Solve for x
    x = 7,321,146,653.51/127,139.42
  6. Step 6: Final answer
    x = 57,583.61

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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.