Home / 249,619.20-374,428.80-81,139.20

Finding the Fourth Proportional to 249,619.20, 374,428.80 and 81,139.20

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Solution

The fourth proportional to 249,619.20, 374,428.80 and 81,139.20 is: 121,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,619.20 : 374,428.80 = 81,139.20 : x
  2. Step 2: Convert to fraction form
    249,619.20/374,428.80 = 81,139.20/x
  3. Step 3: Cross multiply
    249,619.20x = 374,428.80 × 81,139.20
  4. Step 4: Simplify right side
    249,619.20x = 30,380,853,288.96
  5. Step 5: Solve for x
    x = 30,380,853,288.96/249,619.20
  6. Step 6: Final answer
    x = 121,708.80

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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.