Home / 410,140.80-615,159.36-129,686.40

Finding the Fourth Proportional to 410,140.80, 615,159.36 and 129,686.40

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Solution

The fourth proportional to 410,140.80, 615,159.36 and 129,686.40 is: 194,513.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,140.80 : 615,159.36 = 129,686.40 : x
  2. Step 2: Convert to fraction form
    410,140.80/615,159.36 = 129,686.40/x
  3. Step 3: Cross multiply
    410,140.80x = 615,159.36 × 129,686.40
  4. Step 4: Simplify right side
    410,140.80x = 79,777,802,824.70
  5. Step 5: Solve for x
    x = 79,777,802,824.70/410,140.80
  6. Step 6: Final answer
    x = 194,513.21

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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.