Home / 126,913.40-190,139.70-103,412.60

Finding the Fourth Proportional to 126,913.40, 190,139.70 and 103,412.60

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Solution

The fourth proportional to 126,913.40, 190,139.70 and 103,412.60 is: 154,931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,913.40 : 190,139.70 = 103,412.60 : x
  2. Step 2: Convert to fraction form
    126,913.40/190,139.70 = 103,412.60/x
  3. Step 3: Cross multiply
    126,913.40x = 190,139.70 × 103,412.60
  4. Step 4: Simplify right side
    126,913.40x = 19,662,840,740.22
  5. Step 5: Solve for x
    x = 19,662,840,740.22/126,913.40
  6. Step 6: Final answer
    x = 154,931.16

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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.