Home / 215,287.81-297,065.57-129,228.55

Finding the Fourth Proportional to 215,287.81, 297,065.57 and 129,228.55

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Solution

The fourth proportional to 215,287.81, 297,065.57 and 129,228.55 is: 178,316.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,287.81 : 297,065.57 = 129,228.55 : x
  2. Step 2: Convert to fraction form
    215,287.81/297,065.57 = 129,228.55/x
  3. Step 3: Cross multiply
    215,287.81x = 297,065.57 × 129,228.55
  4. Step 4: Simplify right side
    215,287.81x = 38,389,352,866.02
  5. Step 5: Solve for x
    x = 38,389,352,866.02/215,287.81
  6. Step 6: Final answer
    x = 178,316.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.